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Submillimeter- and Millimeter-Wavelength Observations of SIO and HCN in Circumstellar Envelopes of AGB Stars
We report molecular line observations with the Heinrich Hertz Submillimeter Telescope of a sample of 30 asymptotic giant branch stars with spectral types M, S, and C. Measured lines include SiO J =Expand
Kinematics, Kinetic Temperatures, and Column Densities of NH3 in the Orion Hot Core
Using the VLA, we have mapped the Orion Hot Core region (full extent 10'') with an angular resolution of ~1'' in the (J,K) = (4,4) and (10, 9) inversion transitions of 14NH3 and an angular resolutionExpand
Dense Cores in the Orion Molecular Cloud
We have used the Heinrich Hertz submillimeter telescope to measure the J = 3-2 and J = 2-1 lines of 12C16O and 12C18O, and the J = 3-2 line of 13C16O toward 125 high-density cores in the prominentExpand
Radio detection of ammonia in comet Hale-Bopp
Radio emission from ammonia, a suspected parent molecule in comets, was detected from comet Hale-Bopp near its perihelion passage with the 100-m Effelsberg Radio Tele- scope. Signals from the veExpand
DesertSTAR: a 7 pixel 345 GHz heterodyne array receiver for the Heinrich Hertz Telescope
DesertSTAR is a 7 beam, 345 GHz heterodyne array receiver for the Heinrich Hertz Telescope (HHT) on Mt. Graham, AZ. The instrument uses fixed-backshort Superconductor-Insulator-Superconductor (SIS)Expand
K-band Radio Observations of Comet Hale-Bopp: Detections of Ammonia and (Possibly) Water
K-band radio observations of comet Hale-Bopp (C/1995 O1) were conducted in March/April 1997 at the 100-m Telescope of the Max-Planck-Institut für Radioastronomie. Emission was firmly detected fromExpand
We report on heterodyne measurements at submillimeter wavelengths using a receiver with a Superconductor-Insulator-Superconductor (SIS) mixer device and a Microwave Monolithic Integrated CircuitExpand
Full-Scale Three-Dimensional Electromagnetic Simulations of a Terahertz Folded-Waveguide Traveling-Wave Tube Using ICEPIC
This paper discusses simulation and modeling of the slow wave structure of a folded-waveguide terahertz traveling wave tube (TWT) using the Improved Concurrent Electromagnetic Particle In CellExpand
1.5: Development of field emission cathodes, electron gun and a slow wave structure for a terahertz traveling wave tube
High power terahertz (THz) sources and amplifiers hold the potential to greatly improve remote sensing and high bandwidth communication. To enable these applications, a Traveling Wave Tube (TWT)Expand