Bubble-Induced Vibration in Liquid Nitrogen Cryopump (Record no. 112280)
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| 000 -LEADER | |
|---|---|
| fixed length control field | 02112ngm a22001457a 4500 |
| 008 - FIXED-LENGTH DATA ELEMENTS--GENERAL INFORMATION | |
| fixed length control field | 180504b xxu||||| |||| 00| 0 eng d |
| 082 ## - DEWEY DECIMAL CLASSIFICATION NUMBER | |
| Classification number | TT000053 |
| Item number | GUP |
| 100 ## - MAIN ENTRY--PERSONAL NAME | |
| Personal name | Gupta, Manoj Kumar |
| 245 ## - TITLE STATEMENT | |
| Title | Bubble-Induced Vibration in Liquid Nitrogen Cryopump |
| Statement of responsibility, etc | by Manoj Kumar Gupta |
| 260 ## - PUBLICATION, DISTRIBUTION, ETC. (IMPRINT) | |
| Place of publication, distribution, etc | Ahmedabad |
| Name of publisher, distributor, etc | Nirma Institute of Technology |
| Date of publication, distribution, etc | 2017 |
| 300 ## - PHYSICAL DESCRIPTION | |
| Extent | 159p Ph. D. Thesis with Synopsis and CD |
| 500 ## - GENERAL NOTE | |
| General note | Guided by: Dr. D S Sharma and Dr V J Lakhera With Synopsis and CD 13EXTPHDE99<br/><br/>ABSTRACT: Gravitational Waves (GW) predicted by Einstein in 1915 were detected by<br/>LIGO (Laser Interferometer Gravitational-Wave Observatory) on September<br/>14, 2015. This is the first direct detection of GW and the first observation of a<br/>binary black hole merger. The comparative low signal of the GW makes the<br/>observation very challenging; however, continuous improvement in detection<br/>equipment will open to observe more phenomenon of the universe.<br/>Liquid Nitrogen Cryopump is one of the key components of LIGO system to<br/>maintain the UHV and also the main source of noise due to bubbles. The<br/>bubble induced noise is one of the noises that could distort the signal.<br/>Cryogenic fluids are always in the boiling modes and inducing the bubble<br/>noise continuously.<br/>The present work is an attempt to theoretically inv estigate bubble induced<br/>vibration and noise with the help of bubble dynamics. The configuration of<br/>LN2 cryopump as circular concentric shell makes the investigation more<br/>challenging. The departure force on the liquid nitrogen bubble is of the order<br/>of 10-5 N, which provides the initial acceleration of ~2g. The bubble moves<br/>through the liquid nitrogen and impacts the surface, which produces the<br/>vibration and noise. The noise is analyzed in terms of force, acceleration,<br/>velocity and the displacement. The induced noises are in the range -16 dB to -<br/>146 dB. This work will open the new window for th e cryogenic fluid usability<br/>for the vibration free environment. Hence it is a new emerging area of<br/>investigation. |
| 856 ## - ELECTRONIC LOCATION AND ACCESS | |
| Uniform Resource Identifier | http://repository.nirmauni.ac.in/jspui/handle/123456789/7974 |
| Public note | Institute Repository (Campus Access) |
| 856 ## - ELECTRONIC LOCATION AND ACCESS | |
| Uniform Resource Identifier | https://shodhganga.inflibnet.ac.in/jspui/handle/10603/207001 |
| Public note | Shodhganga |
| 942 ## - ADDED ENTRY ELEMENTS (KOHA) | |
| Source of classification or shelving scheme | Dewey Decimal Classification |
| Koha item type | Thesis |
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