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Author Kawamura, Jonathan; Blundell, Raymond; Tong, C.-Y. Edward; Papa, D. Cosmo; Hunter, Todd R.; Paine, Scot.t. N.; Patt, Ferdinand; Gol'tsman, Gregory; Cherednichenko, Sergei; Voronov, Boris; Gershenzon, Eugene doi  openurl
  Title Superconductive hot-electron bolometer mixer receiver for 800 GHz operation Type Miscellaneous
  Year 2000 Publication IEEE Trans. Microwave Theory and Techniques Abbreviated Journal IEEE Trans. Microwave Theory and Techniques  
  Volume 48 Issue 4 Pages 683-689  
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  Call Number RPLAB @ s @ Kawamura_superconductivehot-electron Serial 424  
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Author Loudkov, D.; Tong, C. Y. E.; Blundell, R.; Kaurova, N.; Grishina, E.; Voronov, B.; Gol'tsman, G. openurl 
  Title An investigation of the performance of the superconducting HEB슠mixer as a function of its RF슠embedding impedance Type Journal Article
  Year 2005 Publication IEEE Trans. Appl. Supercond. Abbreviated Journal  
  Volume 15 Issue 2 Pages 472-475  
  Keywords HEB mixer  
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  Call Number Serial 371  
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Author Tong, C. Y. E.; Blundell, R.; Bumble, B.; Stern, J. A.; LeDuc, H. G. openurl 
  Title Sub-Millimeter distributed quasiparticle receiver employing a non-Linear transmission line Type Conference Article
  Year 1996 Publication Proc. 7th Int. Symp. Space Terahertz Technol. Abbreviated Journal  
  Volume Issue Pages 47  
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  Notes Approved no  
  Call Number Serial 271  
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Author Tong, C. Y. E.; Blundell, R.; Paine, S.; Papa, D. C.; Kawamura, J.; Stern, J.; LeDuc, H. G. openurl 
  Title Design and characterization of a 250-350 GHz fixed-tuned superconductor-insulator-insulator receiver Type Journal Article
  Year 1996 Publication IEEE Trans. Microw. Theory Techn. Abbreviated Journal  
  Volume 44 Issue 9 Pages 1548-1556  
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  Call Number Serial 273  
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Author Tong, C. Y. E.; Chen, L.; Blundell, R. openurl 
  Title Theory of distributed mixing and amplification in a superconductingquasi-particle nonlinear transmission line Type Journal Article
  Year 1997 Publication IEEE Trans. Microw. Theory Techn. Abbreviated Journal  
  Volume 45 Issue 7 Pages 1086-1092  
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  Call Number Serial 274  
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Author Kawamura, J. H.; Tong, C.-Y.E.; Blundell, R.; Cosmo Papa, D.; Hunter, T. R.; Gol'tsman, G.; Cherednichenko, S.; Voronov, B.; Gershenzon, E. url  doi
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  Title An 800 GHz NbN phonon-cooled hot-electron bolometer mixer receiver Type Journal Article
  Year 1999 Publication IEEE Trans. Appl. Supercond. Abbreviated Journal IEEE Trans. Appl. Supercond.  
  Volume 9 Issue 2 Pages 3753-3756  
  Keywords NbN HEB mixers  
  Abstract We describe a heterodyne receiver developed for astronomical applications to operate in the 350 /spl mu/m atmospheric window. The waveguide receiver employs a superconductive NbN phonon-cooled hot-electron bolometer mixer. The double sideband receiver noise temperature closely follows 1 kGHz/sup -1/ across 780-870 GHz, with the intermediate frequency centered at 1.4 GHz. The conversion loss is about 15 dB. The receiver was installed for operation at the University of Arizona/Max Planck Institute for Radio Astronomy Submillimeter Telescope facility. The instrument was successfully used to conduct test observations of a number of celestial sources in a number of astronomically important spectral lines.  
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  ISSN 1051-8223 ISBN Medium  
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  Call Number Serial 288  
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Author Tong, C.-Y. Edward; Kawamura, Jonathan; Todd, R. Hunter; Papa, D. Cosmo; Blundell, Raymond.; Smith, Michael; Patt, Ferdinand; Gol'tsman, Gregory; Gershenzon, Eugene url  openurl
  Title Successful operation of a 1 THz NbN hot-electron bolometer receiver Type Conference Article
  Year 2000 Publication Proc. 11th Int. Symp. Space Terahertz Technol. Abbreviated Journal Proc. 11th Int. Symp. Space Terahertz Technol.  
  Volume Issue Pages 49-59  
  Keywords NbN HEB mixers, applications  
  Abstract A phonon-cooled NbN superconductive hot-electron bolometer receiver covering the frequency range 0.8-1.04 THz has successfully been used for astronomical observation at the Sub-Millimeter Telescope Observatory on Mount Graham, Arizona. This waveguide heterodyne receiver is a modified version of our fixed-tuned 800 GHz HEB receiver to allow for operation beyond 1 THz. The measured noise temperature of this receiver is about 1250 K at 0.81 THz, 560 K at 0.84 THz, and 1600 K at 1.035 THz. It has a 1 GHz wide IF bandwidth, centered at 1.8 GHz. This receiver has recently been used to detect the CO (9-8) molecular line emission at 1.037 THz in the Orion nebula. This is the first time a ground-based heterodyne receiver has been used to detect a celestial source above 1 THz.  
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  Call Number Serial 303  
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Author Kawamura, J.; Hunter, T. R.; Tong, C. Y. E.; Blundell, R.; Papa, D. C.; Patt, F.; Peters, W.; Wilson, T.; Henkel, C.; Goltsman, G.; Gershenzon, E. url  doi
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  Title Ground-based terahertz CO spectroscopy towards Orion Type Journal Article
  Year 2002 Publication A&A Abbreviated Journal A&A  
  Volume 394 Issue 1 Pages 271-274  
  Keywords HEB mixers, applications  
  Abstract Using a superconductive hot-electron bolometer heterodyne receiver on the 10-m Heinrich Hertz Telescope on Mount Graham, Arizona, we have obtained velocity-resolved 1.037 THz CO () spectra toward several positions along the Orion Molecular Cloud (OMC-1) ridge. We confirm the general results of prior observations of high-J CO lines that show that the high temperature, , high density molecular gas, , is quite extended, found along a ~ region centered on BN/KL. However, our observations have significantly improved angular resolution, and with a beam size of we are able to spatially and kinematically discriminate the emission originating in the extended quiescent ridge from the very strong and broadened emission originating in the compact molecular outflow. The ridge emission very close to the BN/KL region appears to originate from two distinct clouds along the line of sight with and ≈ . The former component dominates the emission to the south of BN/KL and the latter to the north, with a turnover point coincident with or near BN/KL. Our evidence precludes a simple rotation of the inner ridge and lends support to a model in which there are multiple molecular clouds along the line of sight towards the Orion ridge.  
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  Call Number Serial 322  
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Author Tong, C.-Y. E.; Meledin, D.; Loudkov, D.; Blundell, R.; Erickson, N.; Kawamura, J.; Mehdi, I.; Gol’tsman, G. url  doi
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  Title A 1.5 THz Hot-Electron Bolometer mixer operated by a planar diode based local oscillator Type Conference Article
  Year 2003 Publication IEEE MTT-S Int. Microwave Symp. Digest Abbreviated Journal IEEE MTT-S Int. Microwave Symp. Digest  
  Volume 2 Issue Pages 751-754  
  Keywords waveguide NbN HEB mixers  
  Abstract We have developed a 1.5 THz superconducting NbN Hot-Electron Bolometer mixer. It is operated by an all-solid-state Local Oscillator comprising of a cascade of 4 planar doublers following an MMIC based W-band power amplifier. The threshold available pump power is estimated to be 1 /spl mu/W.  
  Address Philadelphia, PA, USA  
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  Call Number Serial 1516  
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Author Meledin, D.; Tong, C. Y.-E.; Blundell, R.; Kaurova, N.; Smirnov, K.; Voronov, B.; Gol'tsman, G. doi  openurl
  Title Study of the IF bandwidth of NbN HEB mixers based on crystalline quartz substrate with an MgO buffer layer Type Journal Article
  Year 2003 Publication IEEE Trans. Appl. Supercond. Abbreviated Journal IEEE Trans. Appl. Supercond.  
  Volume 13 Issue 2 Pages 164-167  
  Keywords NbN HEB mixer  
  Abstract In this paper, we present the results of IF bandwidth measurements on 3-4 nm thick NbN hot electron bolometer waveguide mixers, which have been fabricated on a 200-nm thick MgO buffer layer deposited on a crystalline quartz substrate. The 3-dB IF bandwidth, measured at an LO frequency of 0.81 THz, is 3.7 GHz at the optimal bias point for low noise receiver operation. We have also made measurements of the IF dynamic impedance, which allow us to evaluate the intrinsic electron temperature relaxation time and self-heating parameters at different bias conditions.  
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  Call Number Serial 341  
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