Zobrazeno 1 - 10
of 116
pro vyhledávání: '"D, Petrac"'
Publikováno v:
Cryogenics. 39:471-479
A large dynamic range superfluid helium, helium II, liquid–vapor phase separator is required for the thermal design of the Space Infrared Telescope Facility (SIRTF). A porous plug type phase separator is adopted for SIRTF mission. A candidate porou
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5095134128d8674190bcf7cb0bb62dae
https://doi.org/10.1016/s0011-2275(99)00063-6
https://doi.org/10.1016/s0011-2275(99)00063-6
Publikováno v:
Cryogenics. 36:823-828
A phase separator, which separates helium vapour from liquid superfluid helium (He II), is an indispensable device for space cryogenics. The most recent approach to the Space Infrared Telescope Facility (SIRTF) uses a new design concept in which only
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9b8466beae4827b475673bf566a18a0d
https://doi.org/10.1016/0011-2275(96)00045-8
https://doi.org/10.1016/0011-2275(96)00045-8
Publikováno v:
Cryogenics. 33:390-394
The Satellite Test of the Equivalence Principle (STEP) experiment is being proposed to improve our knowledge of the equivalence of inertial and gravitational mass by a factor of 106, yielding a crucial test of one of the fundamental postulates of Ein
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::37a155db32108c65f9406dd78bd26567
https://doi.org/10.1016/0011-2275(93)90166-l
https://doi.org/10.1016/0011-2275(93)90166-l
Publikováno v:
Cryogenics. 32:107-110
The Space Infrared Telescope Facility is the last of the Great Observatory missions. It is presently scheduled for launch in 2001. The mission will study the infrared spectrum from 2 to 1200 microns with three imaging and spectral instruments. The ob
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2efabddc713e6829cdae5d8f26aa15b7
https://doi.org/10.1016/0011-2275(92)90251-5
https://doi.org/10.1016/0011-2275(92)90251-5
Autor:
D. Petrac, Ulf E. Israelsson
Publikováno v:
Cryogenics. 30:257-262
Dilution refrigerators are presently used routinely in ground based applications where temperatures below 0.3 K are required. The operation of a conventional dilution refrigerator depends critically on the presence of gravity. To operate a dilution r
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f98820e9b4575d7ba676bb93c6c05536
https://doi.org/10.1016/0011-2275(90)90088-t
https://doi.org/10.1016/0011-2275(90)90088-t
Publikováno v:
Advances in Cryogenic Engineering ISBN: 9781475790498
The Confined Helium Experiment (CHeX) is manifested for flight on the Space Shuttle (STS-87) in November, 1997. The experiment was constrained to re-use a previously flown flight cryogenic system. However, the inherited system did not meet CHeX scien
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::95d71853c6fdf9f1aade55ed595c4a8e
https://doi.org/10.1007/978-1-4757-9047-4_124
https://doi.org/10.1007/978-1-4757-9047-4_124
Autor:
X. Qin, D. Petrac, John A. Lipa, Melora Larson, Mark J. Lysek, Steve Elliott, Talso Chui, D. R. Swanson, Ulf E. Israelsson
Publikováno v:
Advances in Cryogenic Engineering ISBN: 9781475790498
A cryopump flown on the space shuttle for the Lambda Point Experiment1 (LPE) was improved and redesigned for use in the Confined Helium Experiment (CHeX). The successful Lambda Point Experiment (LPE) flew on the space shuttle in October 1992. The Con
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0621cdfb24a1e056c376ebcffc62a91b
https://doi.org/10.1007/978-1-4757-9047-4_125
https://doi.org/10.1007/978-1-4757-9047-4_125
Publikováno v:
A Cryogenic Engineering Conference Publication ISBN: 9781461380221
We report on two means of producing drops of liquid helium for injection into an apparatus designed to hold individual drops isolated from material walls. Using a small thermomechanical pump operated in a pulsed mode, we have produced uncharged drops
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::add7fc4bab140e02155777abcbdc8f27
https://doi.org/10.1007/978-1-4613-0373-2_153
https://doi.org/10.1007/978-1-4613-0373-2_153
Publikováno v:
A Cryogenic Engineering Conference Publication ISBN: 9781461380221
The JPL flight cryostat last flew on the Space Shuttle in October, 1992 in support of the Lambda Point Experiment. A new experiment, the Confined Helium Experiment (CHeX), now in development will reuse this cryostat. An improvement to the cryostat pe
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b933b00a5d1ce7b3b2af542aebf32a12
https://doi.org/10.1007/978-1-4613-0373-2_144
https://doi.org/10.1007/978-1-4613-0373-2_144
Publikováno v:
Lijecnicki vjesnik. 117(7-8)
Non-invasive diagnostic methods (history, ECG, phonocardiography, exercise testing, Holter monitoring and Doppler echocardiography) were done in 48 persons with mitral valve prolapse (MVP). The aim was to establish possible risk factors for occurrenc
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=pmid________::4c38c057c289acbf24bffdc7bd8418ca
https://pubmed.ncbi.nlm.nih.gov/8656971
https://pubmed.ncbi.nlm.nih.gov/8656971