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Title: Long pulse pumping behavior of a cryopump for the neutral beam injector

Abstract

This article presents studies on the long term pumping behavior of a cryopump. It is shown that the pumping speed does not deteriorate on a time scale of 4200 s for a gas load of 2.4x10{sup 5} torr l, corresponding to {approx}10{sup 6} ML of hydrogen. It has also been observed that the need for regeneration of the pump is dictated by the safety limits of operation rather than its pumping capability. No sudden boil off of the cryogen takes place during the regeneration phase.

Authors:
; ; ; ; ; ; ; ;  [1]
  1. Institute for Plasma Research, Bhat, Gandhinagar, 382 428 Gujarat (India)
Publication Date:
OSTI Identifier:
20853953
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Vacuum Science and Technology. A, International Journal Devoted to Vacuum, Surfaces, and Films; Journal Volume: 25; Journal Issue: 1; Other Information: DOI: 10.1116/1.2400677; (c) 2007 American Vacuum Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; BEAMS; CRYOGENIC FLUIDS; EQUIPMENT; HYDROGEN; OPERATION; PULSES; PUMPING; SAFETY; VELOCITY

Citation Formats

Chakrapani, Ch., Sharma, S. K., Chakraborty, A. K., Singh, M. J., Patel, G. B., Rambabu, S., Prajapati, B., Upadhyay, J., and Mattoo, S. K. Long pulse pumping behavior of a cryopump for the neutral beam injector. United States: N. p., 2007. Web. doi:10.1116/1.2400677.
Chakrapani, Ch., Sharma, S. K., Chakraborty, A. K., Singh, M. J., Patel, G. B., Rambabu, S., Prajapati, B., Upadhyay, J., & Mattoo, S. K. Long pulse pumping behavior of a cryopump for the neutral beam injector. United States. doi:10.1116/1.2400677.
Chakrapani, Ch., Sharma, S. K., Chakraborty, A. K., Singh, M. J., Patel, G. B., Rambabu, S., Prajapati, B., Upadhyay, J., and Mattoo, S. K. Mon . "Long pulse pumping behavior of a cryopump for the neutral beam injector". United States. doi:10.1116/1.2400677.
@article{osti_20853953,
title = {Long pulse pumping behavior of a cryopump for the neutral beam injector},
author = {Chakrapani, Ch. and Sharma, S. K. and Chakraborty, A. K. and Singh, M. J. and Patel, G. B. and Rambabu, S. and Prajapati, B. and Upadhyay, J. and Mattoo, S. K.},
abstractNote = {This article presents studies on the long term pumping behavior of a cryopump. It is shown that the pumping speed does not deteriorate on a time scale of 4200 s for a gas load of 2.4x10{sup 5} torr l, corresponding to {approx}10{sup 6} ML of hydrogen. It has also been observed that the need for regeneration of the pump is dictated by the safety limits of operation rather than its pumping capability. No sudden boil off of the cryogen takes place during the regeneration phase.},
doi = {10.1116/1.2400677},
journal = {Journal of Vacuum Science and Technology. A, International Journal Devoted to Vacuum, Surfaces, and Films},
number = 1,
volume = 25,
place = {United States},
year = {Mon Jan 15 00:00:00 EST 2007},
month = {Mon Jan 15 00:00:00 EST 2007}
}