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26th National Symposium on Cryogenics and Superconductivity

22-24 February 2017
VECC
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DESIGN, DEVELOPMENT AND STUDIES ON A LIQUID NITROGEN BASED CRYOSOPTION PUMP
 
Content: Cryosorption pumps are the vacuum pumping method for many high and ultra-high vacuum applications due to their reliability, cleanliness, and high pumping speeds. They are used in several industrial applications such as Semiconductor, Optical Coating, Particle Accelerators, Medical devices etc. and in Research and Development. These pumps generally use activated carbon as the sorbent material for pumping of various gases. Such a pump can be either cryocooler based or cryogenic fluid based. Supercritical liquid helium cooled cryosorption pumps are used in fusion tokamaks for pumping of helium and hydrogen. In our efforts towards the development of cryosorption pumps, we have designed, fabricated and studied cryosorption pumps cooled with liquid nitrogen (LN2). Specially developed activated carbon cloth are adhesively bonded on the surface of copper panels (7 numbers) and mounted inside a vacuum chamber. This chamber when cooled with LN2 forms the cryopump operating at 77 K. In this work, we report the performances of these pumps such as the ultimate vacuum, pumping speeds for different gases such as argon and nitrogen.
Id: 48
Place: VECC 
1/AF, Bidhan Nagar Kolkata - 700008

Room: Meghnad Saha Auditorium, SINP-VECC Campus
Starting date:
--not yet scheduled--   
Duration: 00'
Primary Authors: Dr. THOMAS, Rijo Jacob (Department of Mechanical Engineering TKM College of engineering, Kollam.Kerala.691 005)
Co-Authors: Prof. SHAFI, K.A. (Department of Mechanical Engineering TKM College of engineering, Kollam.Kerala.691 005)
Mr. SKARIA, Mathew (Department of Mechanical Engineering TKM College of engineering, Kollam.Kerala.691 005)
Mr. VASUDEVAN, K. (Department of Mechanical Engineering TKM College of engineering, Kollam.Kerala.691 005)
Mr. VISHNU, P. (Department of Mechanical Engineering TKM College of engineering, Kollam.Kerala.691 005)
Prof. KASTHURIRENGAN, Srinivasan (CCT IISc Bangalore 560012)
Presenters: Dr. THOMAS, Rijo Jacob
Material: paper
 
Included in session: Poster Session 2: Abstract ID 11,33,34,35,36,38,39,40,43,48,52,54,59,66, 67,70,71,78,88,89,90,92,94,100,102,105,107,108, 109,111,112,115,116, 120,121,124,125,127,128,129,131,190
Included in track: Cryocoolers / Cryopumps / Cryogenics Systems