NDLI: The cyclotron gas stopper project at the NSCL

Content Provider	IEEE Xplore Digital Library
Author	Pang, G.K. Bollen, G. Chouhan, S. Guenaut, C. Marti, F. Morrissey, D.J. Lawton, D. Ottarson, J. Schwarz, S. Zeller, A.F. Wada, M.
Copyright Year	2007
Description	Author affiliation: Michigan State Univ., East Lansing (Pang, G.K.; Bollen, G.; Chouhan, S.; Guenaut, C.; Marti, F.; Morrissey, D.J.; Lawton, D.; Ottarson, J.; Schwarz, S.; Zeller, A.F.)
Abstract	Gas stopping is becoming the method of choice for converting beams of rare isotopes produced via projectile fragmentation and in-flight separation into low-energy beams. These beams allow ISOL-type experiments to be conducted on projectile fragmentation products, such as precision mass measurements with traps or laser spectroscopy. Current gas stopping systems for high-energy beams employ a linear gas cell design filled with 0.1-1 bar of helium. While linear gas cells have found success in a variety of experiments, this success is limited due to the space charge effects induced by the ionization of the helium atoms during the stopping process. These space charge effects pose a limit on the maximum incoming beam rate. Furthermore, the extraction time of stopped ions from these devices can exceed 100 ms causing substantial decay losses for very short-lived isotopes. To avoid these limitations, a new type of gas stopper is being developed at the NSCL/MSU. The new system is based on a sector-focused cyclotron magnet with a stopping chamber filled with Helium buffer gas at low pressure. RF-guiding techniques are used to extract the ions. The space charge effects are reduced by the large volume and due to the separation between the region of stopped ions and the region of highest ionization.
Starting Page	3588
Ending Page	3590
File Size	246608
Page Count	3
File Format	PDF
ISBN	9781424409167
DOI	10.1109/PAC.2007.4440501
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2007-06-25
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Cyclotrons Laser beams Helium Space charge Isotopes Projectiles Ionization Gas lasers Mass spectroscopy Atomic beams
Content Type	Text
Resource Type	Article

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

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