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Robey HF, Celliers PM, Kline JL, Mackinnon AJ, Boehly TR, Landen OL, Eggert JH, Hicks D, Le Pape S, Farley DR, Bowers MW, Krauter KG, Munro DH, Jones OS, Milovich JL, Clark D, Spears BK, Town RPJ, Haan SW, Dixit S, Schneider MB, Dewald EL, Widmann K, Moody JD, Döppner TD, Radousky HB, Nikroo A, Kroll JJ, Hamza AV, Horner JB, Bhandarkar SD, Dzenitis E, Alger E, Giraldez E, Castro C, Moreno K, Haynam C, LaFortune KN, Widmayer C, Shaw M, Jancaitis K, Parham T, Holunga DM, Walters CF, Haid B, Malsbury T, Trummer D, Coffee KR, Burr B, Berzins LV, Choate C, Brereton SJ, Azevedo S, Chandrasekaran H, Glenzer S, Caggiano JA, Knauer JP, Frenje JA, Casey DT, Johnson MG, Séguin FH, Young BK, Edwards MJ, Van Wonterghem BM, Kilkenny J, MacGowan BJ, Atherton J, Lindl JD, Meyerhofer DD, Moses E. Precision shock tuning on the national ignition facility. Phys Rev Lett 2012; 108:215004. [PMID: 23003273 DOI: 10.1103/physrevlett.108.215004] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/08/2011] [Indexed: 06/01/2023]
Abstract
Ignition implosions on the National Ignition Facility [J. D. Lindl et al., Phys. Plasmas 11, 339 (2004)] are underway with the goal of compressing deuterium-tritium fuel to a sufficiently high areal density (ρR) to sustain a self-propagating burn wave required for fusion power gain greater than unity. These implosions are driven with a very carefully tailored sequence of four shock waves that must be timed to very high precision to keep the fuel entropy and adiabat low and ρR high. The first series of precision tuning experiments on the National Ignition Facility, which use optical diagnostics to directly measure the strength and timing of all four shocks inside a hohlraum-driven, cryogenic liquid-deuterium-filled capsule interior have now been performed. The results of these experiments are presented demonstrating a significant decrease in adiabat over previously untuned implosions. The impact of the improved shock timing is confirmed in related deuterium-tritium layered capsule implosions, which show the highest fuel compression (ρR~1.0 g/cm(2)) measured to date, exceeding the previous record [V. Goncharov et al., Phys. Rev. Lett. 104, 165001 (2010)] by more than a factor of 3. The experiments also clearly reveal an issue with the 4th shock velocity, which is observed to be 20% slower than predictions from numerical simulation.
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Affiliation(s)
- H F Robey
- Lawrence Livermore National Laboratory, Livermore, California 94551, USA
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Glenzer SH, MacGowan BJ, Meezan NB, Adams PA, Alfonso JB, Alger ET, Alherz Z, Alvarez LF, Alvarez SS, Amick PV, Andersson KS, Andrews SD, Antonini GJ, Arnold PA, Atkinson DP, Auyang L, Azevedo SG, Balaoing BNM, Baltz JA, Barbosa F, Bardsley GW, Barker DA, Barnes AI, Baron A, Beeler RG, Beeman BV, Belk LR, Bell JC, Bell PM, Berger RL, Bergonia MA, Bernardez LJ, Berzins LV, Bettenhausen RC, Bezerides L, Bhandarkar SD, Bishop CL, Bond EJ, Bopp DR, Borgman JA, Bower JR, Bowers GA, Bowers MW, Boyle DT, Bradley DK, Bragg JL, Braucht J, Brinkerhoff DL, Browning DF, Brunton GK, Burkhart SC, Burns SR, Burns KE, Burr B, Burrows LM, Butlin RK, Cahayag NJ, Callahan DA, Cardinale PS, Carey RW, Carlson JW, Casey AD, Castro C, Celeste JR, Chakicherla AY, Chambers FW, Chan C, Chandrasekaran H, Chang C, Chapman RF, Charron K, Chen Y, Christensen MJ, Churby AJ, Clancy TJ, Cline BD, Clowdus LC, Cocherell DG, Coffield FE, Cohen SJ, Costa RL, Cox JR, Curnow GM, Dailey MJ, Danforth PM, Darbee R, Datte PS, Davis JA, Deis GA, Demaret RD, Dewald EL, Di Nicola P, Di Nicola JM, Divol L, Dixit S, Dobson DB, Doppner T, Driscoll JD, Dugorepec J, Duncan JJ, Dupuy PC, Dzenitis EG, Eckart MJ, Edson SL, Edwards GJ, Edwards MJ, Edwards OD, Edwards PW, Ellefson JC, Ellerbee CH, Erbert GV, Estes CM, Fabyan WJ, Fallejo RN, Fedorov M, Felker B, Fink JT, Finney MD, Finnie LF, Fischer MJ, Fisher JM, Fishler BT, Florio JW, Forsman A, Foxworthy CB, Franks RM, Frazier T, Frieder G, Fung T, Gawinski GN, Gibson CR, Giraldez E, Glenn SM, Golick BP, Gonzales H, Gonzales SA, Gonzalez MJ, Griffin KL, Grippen J, Gross SM, Gschweng PH, Gururangan G, Gu K, Haan SW, Hahn SR, Haid BJ, Hamblen JE, Hammel BA, Hamza AV, Hardy DL, Hart DR, Hartley RG, Haynam CA, Heestand GM, Hermann MR, Hermes GL, Hey DS, Hibbard RL, Hicks DG, Hinkel DE, Hipple DL, Hitchcock JD, Hodtwalker DL, Holder JP, Hollis JD, Holtmeier GM, Huber SR, Huey AW, Hulsey DN, Hunter SL, Huppler TR, Hutton MS, Izumi N, Jackson JL, Jackson MA, Jancaitis KS, Jedlovec DR, Johnson B, Johnson MC, Johnson T, Johnston MP, Jones OS, Kalantar DH, Kamperschroer JH, Kauffman RL, Keating GA, Kegelmeyer LM, Kenitzer SL, Kimbrough JR, King K, Kirkwood RK, Klingmann JL, Knittel KM, Kohut TR, Koka KG, Kramer SW, Krammen JE, Krauter KG, Krauter GW, Krieger EK, Kroll JJ, La Fortune KN, Lagin LJ, Lakamsani VK, Landen OL, Lane SW, Langdon AB, Langer SH, Lao N, Larson DW, Latray D, Lau GT, Le Pape S, Lechleiter BL, Lee Y, Lee TL, Li J, Liebman JA, Lindl JD, Locke SF, Loey HK, London RA, Lopez FJ, Lord DM, Lowe-Webb RR, Lown JG, Ludwigsen AP, Lum NW, Lyons RR, Ma T, MacKinnon AJ, Magat MD, Maloy DT, Malsbury TN, Markham G, Marquez RM, Marsh AA, Marshall CD, Marshall SR, Maslennikov IL, Mathisen DG, Mauger GJ, Mauvais MY, McBride JA, McCarville T, McCloud JB, McGrew A, McHale B, MacPhee AG, Meeker JF, Merill JS, Mertens EP, Michel PA, Miller MG, Mills T, Milovich JL, Miramontes R, Montesanti RC, Montoya MM, Moody J, Moody JD, Moreno KA, Morris J, Morriston KM, Nelson JR, Neto M, Neumann JD, Ng E, Ngo QM, Olejniczak BL, Olson RE, Orsi NL, Owens MW, Padilla EH, Pannell TM, Parham TG, Patterson RW, Pavel G, Prasad RR, Pendlton D, Penko FA, Pepmeier BL, Petersen DE, Phillips TW, Pigg D, Piston KW, Pletcher KD, Powell CL, Radousky HB, Raimondi BS, Ralph JE, Rampke RL, Reed RK, Reid WA, Rekow VV, Reynolds JL, Rhodes JJ, Richardson MJ, Rinnert RJ, Riordan BP, Rivenes AS, Rivera AT, Roberts CJ, Robinson JA, Robinson RB, Robison SR, Rodriguez OR, Rogers SP, Rosen MD, Ross GF, Runkel M, Runtal AS, Sacks RA, Sailors SF, Salmon JT, Salmonson JD, Saunders RL, Schaffer JR, Schindler TM, Schmitt MJ, Schneider MB, Segraves KS, Shaw MJ, Sheldrick ME, Shelton RT, Shiflett MK, Shiromizu SJ, Shor M, Silva LL, Silva SA, Skulina KM, Smauley DA, Smith BE, Smith LK, Solomon AL, Sommer S, Soto JG, Spafford NI, Speck DE, Springer PT, Stadermann M, Stanley F, Stone TG, Stout EA, Stratton PL, Strausser RJ, Suter LJ, Sweet W, Swisher MF, Tappero JD, Tassano JB, Taylor JS, Tekle EA, Thai C, Thomas CA, Thomas A, Throop AL, Tietbohl GL, Tillman JM, Town RPJ, Townsend SL, Tribbey KL, Trummer D, Truong J, Vaher J, Valadez M, Van Arsdall P, Van Prooyen AJ, Vergel de Dios EO, Vergino MD, Vernon SP, Vickers JL, Villanueva GT, Vitalich MA, Vonhof SA, Wade FE, Wallace RJ, Warren CT, Warrick AL, Watkins J, Weaver S, Wegner PJ, Weingart MA, Wen J, White KS, Whitman PK, Widmann K, Widmayer CC, Wilhelmsen K, Williams EA, Williams WH, Willis L, Wilson EF, Wilson BA, Witte MC, Work K, Yang PS, Young BK, Youngblood KP, Zacharias RA, Zaleski T, Zapata PG, Zhang H, Zielinski JS, Kline JL, Kyrala GA, Niemann C, Kilkenny JD, Nikroo A, Van Wonterghem BM, Atherton LJ, Moses EI. Demonstration of ignition radiation temperatures in indirect-drive inertial confinement fusion hohlraums. Phys Rev Lett 2011; 106:085004. [PMID: 21405580 DOI: 10.1103/physrevlett.106.085004] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/14/2010] [Indexed: 05/30/2023]
Abstract
We demonstrate the hohlraum radiation temperature and symmetry required for ignition-scale inertial confinement fusion capsule implosions. Cryogenic gas-filled hohlraums with 2.2 mm-diameter capsules are heated with unprecedented laser energies of 1.2 MJ delivered by 192 ultraviolet laser beams on the National Ignition Facility. Laser backscatter measurements show that these hohlraums absorb 87% to 91% of the incident laser power resulting in peak radiation temperatures of T(RAD)=300 eV and a symmetric implosion to a 100 μm diameter hot core.
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Affiliation(s)
- S H Glenzer
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
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Carr CW, Feit MD, Rubenchik AM, De Mange P, Kucheyev SO, Shirk MD, Radousky HB, Demos SG. Radiation produced by femtosecond laser-plasma interaction during dielectric breakdown. Opt Lett 2005; 30:661-663. [PMID: 15792009 DOI: 10.1364/ol.30.000661] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Optical breakdown by femtosecond and nanosecond laser pulses in transparent dielectrics produces an ionized region of dense plasma confined within the bulk of the material. This ionized region is responsible for broadband radiation that accompanies the breakdown process. Spectroscopic measurements of the accompanying light have been used to show that, depending on the laser parameters, the spectra may originate from plasma-induced second-harmonic generation, supercontinuum generation, or thermal emission by the plasma. By monitoring the emission from the ionized region, one can ascertain the predominant breakdown mechanism and the morphology of the damage region.
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Affiliation(s)
- C W Carr
- Lawrence Livermore National Laboratory, Livermore, California 94551, USA.
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DeMange P, Carr CW, Negres RA, Radousky HB, Demos SG. Multiwavelength investigation of laser-damage performance in potassium dihydrogen phosphate after laser annealing. Opt Lett 2005; 30:221-223. [PMID: 15751865 DOI: 10.1364/ol.30.000221] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
The laser-induced damage performance of potassium dihydrogen phosphate and deuterated potassium dihydrogen phosphate nonlinear optical crystals after pre-exposure to lower-energy laser pulses (laser annealing, also known as laser conditioning) is investigated as a function of wavelength for both the damaging and conditioning pulses. We obtain a quantitative evaluation of the bulk damage performance of these materials by measuring the density of damage events as a function of laser parameters. This new method allows for a detailed assessment of the improvement of material performance from laser conditioning and reveals the key parameters for optimizing performance depending on the operational wavelength.
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Affiliation(s)
- P DeMange
- Lawrence Livermore National Laboratory, 7000 East Avenue, Livermore, California 94551-0808, USA.
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Carr CW, Radousky HB, Rubenchik AM, Feit MD, Demos SG. Localized dynamics during laser-induced damage in optical materials. Phys Rev Lett 2004; 92:087401. [PMID: 14995812 DOI: 10.1103/physrevlett.92.087401] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/19/2003] [Indexed: 05/24/2023]
Abstract
Laser-induced damage in wide band-gap optical materials is the result of material modifications arising from extreme conditions occurring during this process. The material absorbs energy from the laser pulse and produces an ionized region that gives rise to broadband emission. By performing a time-resolved investigation of this emission, we demonstrate both that it is blackbody in nature and that it provides the first direct measurement of the localized temperature of the material during and following laser damage initiation for various optical materials. For excitation using nanosecond laser pulses, the plasma, when confined in the bulk, is in thermal equilibrium with the lattice. These results allow for a detailed characterization of temperature, pressure, and electron densities occurring during laser-induced damage.
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Affiliation(s)
- C W Carr
- Lawrence Livermore National Laboratory, 7000 East Avenue, Livermore, California 94551, USA
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Carr CW, Radousky HB, Demos SG. Wavelength dependence of laser-induced damage: determining the damage initiation mechanisms. Phys Rev Lett 2003; 91:127402. [PMID: 14525399 DOI: 10.1103/physrevlett.91.127402] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/19/2002] [Indexed: 05/24/2023]
Abstract
A novel experimental approach is employed to understand the mechanisms of laser induced damage. Using an OPO (optical parametric oscillator) laser, we have measured the damage thresholds of deuterated potassium dihydrogen phosphate (DKDP) from the near ultraviolet into the visible. Distinct steps, whose width is of the order of k(B)T, are observed in the damage threshold at photon energies associated with the number of photons (3-->2 or 4-->3) needed to promote a ground state electron across the energy gap. The wavelength dependence of the damage threshold suggests that a primary mechanism for damage initiation in DKDP is a multiphoton process in which the order is reduced through excited defect state absorption.
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Affiliation(s)
- C W Carr
- Lawrence Livermore National Laboratory, 7000 East Avenue, Livermore, California 94551, USA
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7
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Liu CS, Kioussis N, Demos SG, Radousky HB. Electron- or hole-assisted reactions of H defects in hydrogen-bonded KDP. Phys Rev Lett 2003; 91:015505. [PMID: 12906550 DOI: 10.1103/physrevlett.91.015505] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/24/2003] [Indexed: 05/24/2023]
Abstract
We present an ab initio study of the stability and defect reactions of neutral and charged H interstitial (H(i)) and H vacancy (H(v)) in KH2PO4 (KDP). We find that while there is no interaction between the neutral H(i) and the host, the addition of an electron leads to the ejection of a H host atom and the subsequent formation of an interstitial H2 molecule and a H(v). In sharp contrast, the addition of a hole results in the formation of a hydroxyl bond. Thus, H(i) in both charged states severs the H-bonded network. For the H(v), the addition of a hole leads to the formation of a peroxyl bridge. The neutral H(i) and the positively charged H(v) induce states in the gap. The results elucidate the underlying atomic mechanism for the defect reactions suggested by experiment.
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Affiliation(s)
- C S Liu
- Department of Physics, California State University, Northridge, California 91330-8268, USA
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Demos SG, Staggs M, De Yoreo JJ, Radousky HB. Imaging of laser-induced reactions of individual defect nanoclusters. Opt Lett 2001; 26:1975-1977. [PMID: 18059750 DOI: 10.1364/ol.26.001975] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
The response of individual defect nanoclusters located in the bulk of a dielectric material following exposure to 355-nm, 3-ns high-power laser irradiation is investigated by use of microscopic fluorescence imaging. Experiments were carried out on KH(2)PO(4) crystals. We provide direct imaging of the reaction to an external stimulus of individual defect clusters and demonstrate a novel method of studying the dynamic behavior of bulk defects.
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Demos SG, Staggs M, Yan M, Radousky HB, De Yoreo JJ. Microscopic fluorescence imaging of bulk defect clusters in KH(2)PO(4) crystals. Opt Lett 1999; 24:268-270. [PMID: 18071476 DOI: 10.1364/ol.24.000268] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
A microscopic fluorescence imaging system is used to detect optically active centers located inside a transparent dielectric crystal. Defect centers in the bulk of KH(2)PO(4) crystals are imaged based on their near-infrared emission following photoexcitation. The spatial resolution of the system is 1mum in the image plane and 25mum in depth. The experimental results indicate the presence of a large number of optically active defect clusters in different KH(2)PO(4) crystals, whereas the concentration of these clusters depends on the crystal sector and growth method.
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Cheng SC, Dravid VP, Goodwin TJ, Shelton RN, Radousky HB. Determination of the valence of Pr in (Eu1.5-xPrxCe0.5)Sr2Cu2NbO10 superconducting compounds by electron-energy-loss spectroscopy. Phys Rev B Condens Matter 1996; 53:11779-11783. [PMID: 9982805 DOI: 10.1103/physrevb.53.11779] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Bennahmias M, Radousky HB, Buford CM, Kebede AB, McIntyre M, Goodwin TJ, Shelton RN. Magnetic studies of Ta doping in Pr1.5Ce0.5Sr2Cu2NbO10. Phys Rev B Condens Matter 1996; 53:2773-2780. [PMID: 9983788 DOI: 10.1103/physrevb.53.2773] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Park SJ, Kouvel JS, Radousky HB, Liu JZ. Cross-flux effect as a vortex pinning process in YBa2Cu3O7 and Y0.8Pr0.2Ba2Cu3O7 crystals. Phys Rev B Condens Matter 1993; 48:13998-14000. [PMID: 10007806 DOI: 10.1103/physrevb.48.13998] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Bennahmias M, Bello AF, Back D, Radousky HB, Goodwin TJ, Klavins P, Shelton RN. Magnetic properties of polycrystalline R1.5Ce0.5Sr2Cu2NbO10 (R=Eu, Nd, and Sm) high-Tc superconducting ceramics. Phys Rev B Condens Matter 1993; 48:6525-6532. [PMID: 10009205 DOI: 10.1103/physrevb.48.6525] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Nguyen PP, Wang Z, Rao AM, Dresselhaus MS, Moodera JS, Dresselhaus G, Radousky HB, Glass RS, Liu JZ. Transport and magnetic properties of YBa2Cu3O7- delta Bry single crystals. Phys Rev B Condens Matter 1993; 48:1148-1155. [PMID: 10007975 DOI: 10.1103/physrevb.48.1148] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Rosov N, Lynn JW, Radousky HB, Bennahmias M, Goodwin TJ, Klavins P, Shelton RN. Crystal structure and magnetic ordering of the rare-earth and Cu moments in RBa2Cu2NbO8 (R=Nd,Pr). Phys Rev B Condens Matter 1993; 47:15256-15264. [PMID: 10005899 DOI: 10.1103/physrevb.47.15256] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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16
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Bennahmias M, O'Brien JC, Radousky HB, Goodwin TJ, Klavins P, Link JM, Smith CA, Shelton RN. Magnetic, structural, and Raman characterization of RBa2Cu2NbO8(R=Pr, La, or Nd). Phys Rev B Condens Matter 1992; 46:11986-11992. [PMID: 10003096 DOI: 10.1103/physrevb.46.11986] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Lan MD, Liu JZ, Shelton RN, Radousky HB, Veal BW, Downey JW. Magnetic properties of oxygen-depleted YBa2Cu3O7-y single crystals. Phys Rev B Condens Matter 1992; 46:11919-11922. [PMID: 10003088 DOI: 10.1103/physrevb.46.11919] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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McCarty KF, Liu JZ, Jia YX, Shelton RN, Radousky HB. Temperature dependence of the phonon frequencies, linewidths, and Raman-continuum scattering of single-domain Y0.56Pr0.44Ba2Cu3O7. Phys Rev B Condens Matter 1992; 46:11958-11964. [PMID: 10003093 DOI: 10.1103/physrevb.46.11958] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Jia YX, Liu JZ, Lan MD, Klavins P, Shelton RN, Radousky HB. Upper critical field Hc2 of single-crystal Y1-xPrxBa2Cu3O7- delta. Phys Rev B Condens Matter 1992; 45:10609-10615. [PMID: 10000967 DOI: 10.1103/physrevb.45.10609] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Tobin JG, Olson CG, Gu C, Liu JZ, Solal FR, Fluss MJ, Howell RH, O'Brien JC, Radousky HB, Sterne PA. Valence bands and Fermi-surface topology of untwinned single-crystal YBa2Cu3O6.9. Phys Rev B Condens Matter 1992; 45:5563-5576. [PMID: 10000275 DOI: 10.1103/physrevb.45.5563] [Citation(s) in RCA: 50] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Wang Y, Rao AM, Zhang J, Bi X, Eklund PC, Dresselhaus MS, Nguyen PP, Moodera JS, Dresselhaus G, Radousky HB, Glass RS, Fluss MJ, Liu JZ. ab-plane optical properties of YBa2Cu3O7- delta Bry single crystals. Phys Rev B Condens Matter 1992; 45:2523-2526. [PMID: 10001786 DOI: 10.1103/physrevb.45.2523] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Yoo CS, Radousky HB, Holmes NC, Edelstein NM. Luminescence of Sm2+ ions as a probe of pressure-induced phase transitions in SrF2. Phys Rev B Condens Matter 1991; 44:830-833. [PMID: 9999190 DOI: 10.1103/physrevb.44.830] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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McCarty KF, Radousky HB, Liu JZ, Shelton RN. Temperature dependence of the linewidths of the Raman-active phonons of YBa2Cu3O7: Evidence for a superconducting gap between 440 and 500 cm-1. Phys Rev B Condens Matter 1991; 43:13751-13754. [PMID: 9997239 DOI: 10.1103/physrevb.43.13751] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Phillips NE, Fisher RA, Caspary R, Amato A, Radousky HB, Peng JL, Zhang L, Shelton RN. Magnetic-ordering, hyperfine, and linear contributions to the low-temperature specific heat of (Y1-xPrx)Ba2Cu3O7- delta. Phys Rev B Condens Matter 1991; 43:11488-11491. [PMID: 9996909 DOI: 10.1103/physrevb.43.11488] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Nellis WJ, Radousky HB, Hamilton DC, Mitchell AC, Holmes NC, Christianson KB, van Thiel M. Equation‐of‐state, shock‐temperature, and electrical‐conductivity data of dense fluid nitrogen in the region of the dissociative phase transition. J Chem Phys 1991. [DOI: 10.1063/1.459895] [Citation(s) in RCA: 101] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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McCarty KF, Liu JZ, Shelton RN, Radousky HB. Electronic Raman scattering of YBa2Cu3O7 using c-axis polarization: Evidence for two characteristic superconducting energies. Phys Rev B Condens Matter 1990; 42:9973-9977. [PMID: 9995249 DOI: 10.1103/physrevb.42.9973] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Radousky HB, Mitchell AC, Nellis WJ. Shock temperature measurements of planetary ices: NH3, CH4, and ‘‘synthetic Uranus’’. J Chem Phys 1990. [DOI: 10.1063/1.459302] [Citation(s) in RCA: 47] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Bonner BP, Reichlin R, Martin S, Radousky HB, Folkerts TJ, Shelton RN. Anomalous pressure dependence of optical reflectivity in the superconductor Ba0.6K0.4BiO3. Phys Rev B Condens Matter 1990; 41:11576-11578. [PMID: 9993581 DOI: 10.1103/physrevb.41.11576] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Radousky HB, Glass RS, Hahn PA, Fluss MJ, Meisenheimer RG, Bonner BP, Mertzbacher CI, Larson EM, McKeegan KD, O'Brien JC, Peng JL, Shelton RN, McCarty KF. Metallization and superconducting properties of YBa2Cu3O6.2Bry. Phys Rev B Condens Matter 1990; 41:11140-11148. [PMID: 9993533 DOI: 10.1103/physrevb.41.11140] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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McCarty KF, Liu JZ, Shelton RN, Radousky HB. Raman-active phonons of a twin-free YBa2Cu3O7 crystal: A complete polarization analysis. Phys Rev B Condens Matter 1990; 41:8792-8797. [PMID: 9993217 DOI: 10.1103/physrevb.41.8792] [Citation(s) in RCA: 56] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Peng JL, Shelton RN, Radousky HB. Kondo effect and superconductivity in Nd2-xCexCuO4- delta compounds. Phys Rev B Condens Matter 1990; 41:187-192. [PMID: 9992754 DOI: 10.1103/physrevb.41.187] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Peng JL, Klavins P, Shelton RN, Radousky HB, Hahn PA, Bernardez L. Upper critical field and normal-state properties of single-phase Y1-xPrxBa2Cu3O7- gamma compounds. Phys Rev B Condens Matter 1989; 40:4517-4526. [PMID: 9992443 DOI: 10.1103/physrevb.40.4517] [Citation(s) in RCA: 95] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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McCarty KF, Radousky HB, Hinks DG, Zheng Y, Mitchell AW, Folkerts TJ, Shelton RN. Electron-phonon coupling in superconducting Ba0.6K0.4BiO3: A Raman scattering study. Phys Rev B Condens Matter 1989; 40:2662-2665. [PMID: 9992181 DOI: 10.1103/physrevb.40.2662] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Radousky HB, McCarty KF, Peng JL, Shelton RN. Preparation and Raman analysis of single-phase Y1-xPrxBa2Cu3O7- delta. Phys Rev B Condens Matter 1989; 39:12383-12386. [PMID: 9948099 DOI: 10.1103/physrevb.39.12383] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Peng JL, Klavins P, Shelton RN, Radousky HB, Hahn PA, Bernardez L, Costantino M. Preparation, characterization, and superconducting properties of tetragonal LaBaCaCu3O7+ delta. Phys Rev B Condens Matter 1989; 39:9074-9079. [PMID: 9947634 DOI: 10.1103/physrevb.39.9074] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Nellis WJ, Hamilton DC, Holmes NC, Radousky HB, Ree FH, Mitchell AC, Nicol M. The Nature of the Interior of Uranus Based on Studies of Planetary Ices at High Dynamic Pressure. Science 1988; 240:779-81. [PMID: 17741451 DOI: 10.1126/science.240.4853.779] [Citation(s) in RCA: 92] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Data from the Voyager II spacecraft showed that Uranus has a large magnetic field with geometry similar to an offset tilted dipole. To interpret the origin of the magnetic field, measurements were made of electrical conductivity and equation-of-state data of the planetary "ices" ammonia, methane, and "synthetic Uranus" at shock pressures and temperatures up to 75 gigapascals and 5000 K. These pressures and temperatures correspond to conditions at the depths at which the surface magnetic field is generated. Above 40 gigapascals the conductivities of synthetic Uranus, water, and ammonia plateau at about 20(ohm-cm)(-1), providing an upper limit for the electrical conductivity used in kinematic or dynamo calculations. The nature of materials at the extreme conditions in the interior is discussed.
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Radousky HB, Nellis WJ, Ross M, Hamilton DC, Mitchell AC. Molecular dissociation and shock-induced cooling in fluid nitrogen at high densities and temperatures. Phys Rev Lett 1986; 57:2419-2422. [PMID: 10033720 DOI: 10.1103/physrevlett.57.2419] [Citation(s) in RCA: 28] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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