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Cosmology Seminar: Brad Holden (UC Santa Cruz)
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HEPL-KIPAC Seminar: Bob-Kline Schoder, Ph.D & Odile Clavier, Ph.D
| What | HEPL seminar |
|---|---|
| When |
12 March 08 from 04:00 pm to 05:30 pm |
| Where | P&A Bldg.,Conf. Rm 102/103 |
| Contact Name | Dawn Soriano |
| Contact Email | dsoriano@stanford.edu |
| Add event to calendar |
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Bob Kline-Schoder, Ph.D.
Principal Engineer and Vice President from Creare Inc., Hanover, NH
"Resuscitating the Hubble Space Telescope With a Cryogenic Refrigerator"
Abstract: When the Hubble Space Telescope (HST) was originally launched, one of its instruments, the Near Infrared Camera and Multi-Object Spectrometer(NICMOS), was intended to be kept at cryogenic temperatures using boil-off from a solid block of nitrogen. Mission time (limited by consumption of the solid nitrogen for cooling) for NICMOS was expected to be over 5 years, however, after less than 3 years the system warmed up and no nitrogen was left. At that time, NASA engineers decided to replace the solid cryogen with a cryogenic refrigerator. NASA approached Creare Inc., a small engineering research and development company in Hanover, NH that had been developing space cryogenic refrigerator technology based on the Reverse Brayton Cycle for over a 20 year period. Creare had recently completed a long term ground demonstration of a 65 K cooler and was asked to fabricate a duplicate system, space qualify the system on a Shuttle flight, and then support installation of the system on the HST. During this seminar, we will provide additional background on the problem, describe the theory behind the design of the cryocooler, explain how the cryocooler was built in a short period of time, and review the space qualification, installation, and operation of the cryocooler on orbit.
Engineer from Creare Inc., Hanover, NH
"Hearing Assessment System for Space Station Astronauts and Other Research in Human Hearing"
Abstract: Creare has been pursuing research in a variety of areas related to human hearing, including hearing protection for very high noise areas self-administered hearing assessment for astronauts and communication systems based on bone conduction of sound. We will provide a brief overview of this area of research and describe some of the challenges associated with turning common audiologist tools into lightweight, portable and field-able systems.
MASS: Paul Simeon