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Studies of cryocooler based cryosorption pump with activated carbon panels operating at 11K

Kasthurirengan, S and Behera, Upendra and Gangradey, Ranjana and Udgata, Swarup and Krishnamoorthy, V (2012) Studies of cryocooler based cryosorption pump with activated carbon panels operating at 11K. In: Journal of Physics, 390 . 012068_1-012068_7.

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Official URL: http://dx.doi.org/10.1088/1742-6596/390/1/012068

Abstract

Cryosorption pump is the only solution for pumping helium and hydrogen in fusion reactors. It is chosen because it offers highest pumping speed as well as the only suitable pump for the harsh environments in a tokamak. Towards the development of such cryosorption pumps, the optimal choice of the right activated carbon panels is essential. In order to characterize the performance of the panels with indigenously developed activated carbon, a cryocooler based cryosorption pump with scaled down sizes of panels is experimented. The results are compared with the commercial cryopanel used in a CTI cryosorption (model: Cryotorr 7) pump. The cryopanel is mounted on the cold head of the second stage GM cryocooler which cools the cryopanel down to 11K with first stage reaching about similar to 50K. With no heat load, cryopump gives the ultimate vacuum of 2.1E-7 mbar. The pumping speed of different gases such as nitrogen, argon, hydrogen, helium are tested both on indigenous and commercial cryopanel. These studies serve as a bench mark towards the development of better cryopanels to be cooled by liquid helium for use with tokamak.

Item Type: Journal Article
Additional Information: International Symposium on Vacuum Science and Technology and its Application for Accelerators (IVS), Variable Energy Cyclotron Ctr (VECC), Kolkata, INDIA, FEB 15-17, 2012
Department/Centre: Division of Physical & Mathematical Sciences > Centre for Cryogenic Technology
Depositing User: Francis Jayakanth
Date Deposited: 12 Jun 2013 11:32
Last Modified: 12 Jun 2013 11:32
URI: http://eprints.iisc.ac.in/id/eprint/46709

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