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Author Wyss, R. A.; Karasik, B. S.; McGrath, W. R.; Bamble, B.; LeDuc, H. openurl 
  Title Noise and bandwidth measurements of diffusion–cooled Nb hot–electron bolometer mixers at frequencies above the superconductive energy gap Type Conference Article
  Year 1999 Publication Proc. 10th Int. Symp. Space Terahertz Technol. Abbreviated Journal  
  Volume Issue Pages 215-229  
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  Corporate Author Thesis  
  Publisher Place of Publication Charlottesville, Virginia Editor  
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  ISSN ISBN Medium  
  Area Expedition Conference  
  Notes Approved no  
  Call Number RPLAB @ s @ qoheb_Tn_1250_at_1p1 Serial 293  
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Author Chattopadhyay, G.; Rice, F.; Miller, D.; LeDuc, H. G.; Zmuidzinas, J. openurl 
  Title A 530-GHz balanced mixer Type Journal Article
  Year 1999 Publication IEEE Microw. and Guided Wave Lett. Abbreviated Journal  
  Volume 9 Issue 11 Pages 467-469  
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  Notes Approved no  
  Call Number RPLAB @ s @ sis_Chattopadhyay_1999 Serial 301  
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Author Karpov, A.; Miller, D.; Rice, F.; Zmuidzinas, J.; Stern, J. A.; Bumble, B.; LeDuc, H. G. openurl 
  Title 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 Skalare, A.; McGrath, William R.; Echternach, P. M.; Leduc, H. G.; Siddiqi, I.; Verevkin, A.; Prober, D. E. doi  openurl
  Title Aluminum hot-electron bolometer mixers at submillimeter wavelengths Type Journal Article
  Year 2001 Publication IEEE Trans. Appl. Supercond. Abbreviated Journal  
  Volume 11 Issue 1 Pages 641-644  
  Keywords (up) Al HEB mixer, contacts, interface, in situ, in-situ, Aluminium HEB mixer  
  Abstract Diffusion-cooled aluminum hot-electron bolometer (HEB) mixers are of interest for low-noise high resolution THz-frequency spectroscopy within astrophysics. Al HEB mixers offer operation with an order of magnitude less local oscillator power, higher intermediate frequency bandwidth and potentially lower noise than competing devices made from other materials. We report on mixer experiments at 618 GHz with devices fabricated from films with sheet resistances in the range from about 55 Ω down to about 9 Ω per square. Intermediate frequency bandwidths of up to 3 GHz were measured (1 μm long device), with absorbed local oscillator power levels of 0.5 to 6 nW and mixer conversion up to -21.5 dB. High input coupling efficiency implies that the electrons in the device are able to thermalize before escaping from the device. It was found that the long coherence length complicates mixer operations due to the proximity of the contact pads. Also, saturation at the IF frequency may be a concern for this type of device, and warrants further studies.  
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  ISSN 1051-8223 ISBN Medium  
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  Notes Approved no  
  Call Number ref919426b Serial 1061  
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Author Hartogh, P.; Jarchow, C.; Lellouch, E.; de Val-Borro, M.; Rengel, M.; Moreno, R.; Medvedev, A. S.; Sagawa, H.; Swinyard, B. M.; Cavalié, T.; Lis, D. C.; BłÄ™cka, M. I.; Banaszkiewicz, M.; Bockelée-Morvan, D.; Crovisier, J.; Encrenaz, T.; Küppers, M.; Lara, L.-M.; Szutowicz, S.; Vandenbussche, B.; Bensch, F.; Bergin, E. A.; Billebaud, F.; Biver, N.; Blake, G. A.; Blommaert, J. A. D. L.; Cernicharo, J.; Decin, L.; Encrenaz, P.; Feuchtgruber, H.; Fulton, T.; de Graauw, T.; Jehin, E.; Kidger, M.; Lorente, R.; Naylor, D. A.; Portyankina, G.; Sánchez-Portal, M.; Schieder, R.; Sidher, S.; Thomas, N.; Verdugo, E.; Waelkens, C.; Whyborn, N.; Teyssier, D.; Helmich, F.; Roelfsema, P.; Stutzki, J.; LeDuc, H. G.; Stern, J. A. doi  openurl
  Title Herschel/HIFI observations of Mars: First detection of O2 at submillimetre wavelengths and upper limits on HCl and H2O2 Type Journal Article
  Year 2010 Publication Astron. Astrophys. Abbreviated Journal  
  Volume 521 Issue Pages L49  
  Keywords (up) HEB mixer applications, HIFI, Herschel, planets and satellites: atmospheres / radiative transfer / submillimeter: general / molecular processes  
  Abstract We report on an initial analysis of Herschel/HIFI observations of hydrogen chloride (HCl), hydrogen peroxide (H2O2), and molecular oxygen (O2) in the Martian atmosphere performed on 13 and 16 April 2010 (Ls ~ 77°). We derived a constant volume mixing ratio of 1400 ± 120 ppm for O2 and determined upper limits of 200 ppt for HCl and 2 ppb for H2O2. Radiative transfer model calculations indicate that the vertical profile of O2 may not be constant. Photochemical models determine the lowest values of H2O2 to be around Ls ~ 75° but overestimate the volume mixing ratio compared to our measurements.  
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  Notes Approved no  
  Call Number Serial 1093  
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