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Author Chen, P. S. url  doi
openurl 
  Title (up) Infrared properties of barium stars Type Journal Article
  Year 2001 Publication Astron. Astrophys. Abbreviated Journal A&A  
  Volume 372 Issue 1 Pages 245-248  
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  ISSN 0004-6361 ISBN Medium  
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  Notes Approved no  
  Call Number RPLAB @ s @ Serial 415  
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Author Cherednichenko, S.; Kroug, M.; Merkel, H.; Kollberg, E.; Loudkov, D.; Smirnov, K.; Voronov, B.; Gol'tsman, G.; Gershenzon, E. url  openurl
  Title (up) Local oscillator power requirement and saturation effects in NbN HEB mixers Type Conference Article
  Year 2001 Publication Proc. 12th Int. Symp. Space Terahertz Technol. Abbreviated Journal Proc. 12th Int. Symp. Space Terahertz Technol.  
  Volume Issue Pages 273-285  
  Keywords NbN HEB mixers, LO power, local oscillator power, saturation effect, dynamic range  
  Abstract The local oscillator power required for NbN hot-electron bolometric mixers (P LO ) was investigated with respect to mixer size, critical temperature and ambient temperature. P LO can be decreased by a factor of 10 as the mixer size decreases from 4×0.4 µm 2 to 0.6×0.13 µm 2 . For the smallest volume mixer the optimal local oscillator power was found to be 15 nW. We found that for such mixer no signal compression was observed up to an input signal of 2 nW which corresponds to an equivalent input load of 20,000 K. For a constant mixer volume, reduction of T c can decrease optimal local oscillator power at least by a factor of 2 without a deterioration of the receiver noise temperature. Bath temperature was found to have minor effect on the receiver characteristics.  
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  Publisher Place of Publication San Diego, CA, USA Editor Jet Propulsion Laboratory, California Inst.it.u.t.e of Technology  
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  Notes Approved no  
  Call Number Serial 318  
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Author Karpov, A.; Miller, D.; Rice, F.; Zmuidzinas, J.; Stern, J. A.; Bumble, B.; LeDuc, H. G. openurl 
  Title (up) Low noise 1.2 THz SIS receiver Type Conference Article
  Year 2001 Publication Proc. 12th Int. Symp. Space Terahertz Technol. Abbreviated Journal  
  Volume Issue Pages 21-22  
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  Publisher Place of Publication San Diego, CA, USA Editor Jet Propulsion Laboratory, California Inst.it.u.t.e of Technology  
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  Notes Approved no  
  Call Number RPLAB @ s @ sis_650K_at_1p13THz Serial 316  
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Author Jackson, B. D.; Baryshev, A. M.; de Lange, G.; Gao, J. R.; Shitov, S. V.; Iosad, N. N.; Klapwijk, T. M. openurl 
  Title (up) Low-noise 1 THz superconductor-insulator-superconductor mixer incorporating a NbTiN/SiO2/Al tuning circuit Type Journal Article
  Year 2001 Publication Appl. Phys. Lett. Abbreviated Journal  
  Volume 79 Issue 3 Pages 436  
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  Call Number RPLAB @ s @ sis_Jackson_2001 Serial 314  
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Author Mel’nikov, A. P.; Gurvich, Y. A.; Shestakov, L. N.; Gershenzon, E. M. url  doi
openurl 
  Title (up) Magnetic field effects on the nonohmic impurity conduction of uncompensated crystalline silicon Type Journal Article
  Year 2001 Publication Jetp Lett. Abbreviated Journal Jetp Lett.  
  Volume 73 Issue 1 Pages 44-47  
  Keywords uncompensated crystalline silicon, nonohmic impurity conduction, magnetic field  
  Abstract The impurity conduction of a series of crystalline silicon samples with the concentration of major impurity N ≈ 3 × 1016 cm−3 and with a varied, but very small, compensation K was measured as a function of the electric field E in various magnetic fields H-σ(H, E). It was found that, at K < 10−3 and in moderate E, where these samples are characterized by a negative nonohmicity (dσ(0, E)/dE < 0), the ratio σ(H, E)/σ(0, E) > 1 (negative magnetoresistance). With increasing E, these inequalities are simultaneously reversed (positive nonohmicity and positive magnetoresistance). It is suggested that both negative and positive nonohmicities are due to electron transitions in electric fields from impurity ground states to states in the Mott-Hubbard gap.  
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  ISSN 0021-3640 ISBN Medium  
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  Notes Approved no  
  Call Number Serial 1752  
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