Measuring correlations between beam loss and residual radiation in the Fermilab Main Injector

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In order to control beam loss for high intensity operation of the Fermilab Main Injector, electronics has been implemented to provide detailed loss measurements using gas-filled ionization monitors. Software to enhance routine operation and studies has been developed and losses are logged for each acceleration cycle. A systematic study of residual radiation at selected locations in the accelerator tunnel have been carried out by logging residual radiation at each of 142 bar-coded locations. We report on fits of the residual radiation measurements to half-life weighted sums of the beam loss data using a few characteristic lifetimes. The data are now ... continued below

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4 pages

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Brown, Bruce C.; Wu, Guan Hong & /Fermilab September 1, 2010.

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In order to control beam loss for high intensity operation of the Fermilab Main Injector, electronics has been implemented to provide detailed loss measurements using gas-filled ionization monitors. Software to enhance routine operation and studies has been developed and losses are logged for each acceleration cycle. A systematic study of residual radiation at selected locations in the accelerator tunnel have been carried out by logging residual radiation at each of 142 bar-coded locations. We report on fits of the residual radiation measurements to half-life weighted sums of the beam loss data using a few characteristic lifetimes. The data are now available over a multi-year period including residual radiation measurements repeated multiple times during three extended facility shutdown periods. Measurement intervals of a few weeks combined with variable delays between beam off time and the residual measurement permits sensitivity to lifetimes from hours to years. The results allow planning for work in radiation areas to be based on calibrated analytic models.

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4 pages

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  • Presented at 46th ICFA Advanced Beam Dynamics Workshop HB2010, Morschach, Switzerland, Sep 27 - Oct 1 2010

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  • Report No.: FERMILAB-CONF-10-368-AD
  • Grant Number: AC02-07CH11359
  • Office of Scientific & Technical Information Report Number: 990375
  • Archival Resource Key: ark:/67531/metadc1014435

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Office of Scientific & Technical Information Technical Reports

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  • September 1, 2010

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  • Oct. 14, 2017, 8:36 a.m.

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  • Oct. 24, 2017, 9:49 p.m.

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Brown, Bruce C.; Wu, Guan Hong & /Fermilab. Measuring correlations between beam loss and residual radiation in the Fermilab Main Injector, article, September 1, 2010; Batavia, Illinois. (digital.library.unt.edu/ark:/67531/metadc1014435/: accessed December 15, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.