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Title: Density changes in low pressure gas targets for electron scattering experiments

Abstract

A system of modular sealed gas target cells has been developed for use in electron scattering experiments at the Thomas Jefferson National Accelerator Facility (Jefferson Lab). This system was initially developed to complete the MARATHON experiment which required, among other species, tritium as a target material. Thus far, the cells have been loaded with the gas species 3H, 3He, 2H, 1H and 40Ar and operated in nominal beam currents of up to 22.5 μA in Jefferson Lab's Hall A. While the gas density of the cells at the time of loading is known, the density of each gas varies uniquely when heated by the electron beam. To extract experimental cross sections using these cells, density dependence on beam current of each target fluid must be determined. In this study, data from measurements with several beam currents within the range of 2.5 to 22.5 μA on each target fluid are presented. In addition, expressions for the beam current dependent fluid density of each target are developed.

Authors:
 [1];  [2];  [3];  [4];  [5];  [4];  [6];  [7];  [8];  [9];  [2];  [10];  [3];  [11];  [12];  [1];  [13];  [3];  [2];  [14] more »;  [15];  [9];  [8];  [2];  [16] « less
  1. Univ. of New Hampshire, Durham, NH (United States)
  2. Kent State Univ., Kent, OH (United States)
  3. Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
  4. College of William and Mary, Williamsburg, VA (United States)
  5. Univ. of Tennessee, Knoxville, TN (United States)
  6. Saint Mary's Univ., Halifax, NS (Canada)
  7. Florida Intl Univ., Miami, FL (United States)
  8. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
  9. Virginia Polytechnic Inst. and State Univ. (Virginia Tech), Blacksburg, VA (United States)
  10. Old Dominion Univ., Norfolk, VA (United States)
  11. Argonne National Lab. (ANL), Argonne, IL (United States); California Inst. of Technology (CalTech), Pasadena, CA (United States)
  12. Stony Brook Univ., Stony Brook, NY (United States)
  13. Columbia Univ., New York, NY (United States)
  14. Univ. of Virginia, Charlottesville, VA (United States)
  15. Hampton Univ., Hampton, VA (United States)
  16. Argonne National Lab. (ANL), Argonne, IL (United States)
Publication Date:
Research Org.:
Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)
OSTI Identifier:
1526483
Alternate Identifier(s):
OSTI ID: 1529670
Report Number(s):
JLAB-PHY-19-2850; 1811.12167; DOE/OR/23177-4626
Journal ID: ISSN 0168-9002
Grant/Contract Number:  
AC05-06OR23177; AC02-06CH11357; SC0013615; NSF PHY 1506459; NSF PHY 1812340
Resource Type:
Accepted Manuscript
Journal Name:
Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment
Additional Journal Information:
Journal Name: Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment; Journal ID: ISSN 0168-9002
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; 46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; Target; Tritium; Helium; Deuterium; Hydrogen; Argon

Citation Formats

Santiesteban, S. N., Alsalmi, S., Meekins, D., Gayoso, C. Ayerbe, Bane, J., Barcus, S., Campbell, J., Castellanos, J., Cruz-Torres, R., Dai, H., Hague, T., Hauenstein, F., Higinbotham, D. W., Holt, R. J., Kutz, T., Li, S., Liu, H., McClellan, R. E., Nycz, M., Nguyen, D., Pandey, B., Pandey, V., Schmidt, A., Su, T., and Ye, Z. Density changes in low pressure gas targets for electron scattering experiments. United States: N. p., 2019. Web. doi:10.1016/j.nima.2019.06.025.
Santiesteban, S. N., Alsalmi, S., Meekins, D., Gayoso, C. Ayerbe, Bane, J., Barcus, S., Campbell, J., Castellanos, J., Cruz-Torres, R., Dai, H., Hague, T., Hauenstein, F., Higinbotham, D. W., Holt, R. J., Kutz, T., Li, S., Liu, H., McClellan, R. E., Nycz, M., Nguyen, D., Pandey, B., Pandey, V., Schmidt, A., Su, T., & Ye, Z. Density changes in low pressure gas targets for electron scattering experiments. United States. doi:10.1016/j.nima.2019.06.025.
Santiesteban, S. N., Alsalmi, S., Meekins, D., Gayoso, C. Ayerbe, Bane, J., Barcus, S., Campbell, J., Castellanos, J., Cruz-Torres, R., Dai, H., Hague, T., Hauenstein, F., Higinbotham, D. W., Holt, R. J., Kutz, T., Li, S., Liu, H., McClellan, R. E., Nycz, M., Nguyen, D., Pandey, B., Pandey, V., Schmidt, A., Su, T., and Ye, Z. Fri . "Density changes in low pressure gas targets for electron scattering experiments". United States. doi:10.1016/j.nima.2019.06.025.
@article{osti_1526483,
title = {Density changes in low pressure gas targets for electron scattering experiments},
author = {Santiesteban, S. N. and Alsalmi, S. and Meekins, D. and Gayoso, C. Ayerbe and Bane, J. and Barcus, S. and Campbell, J. and Castellanos, J. and Cruz-Torres, R. and Dai, H. and Hague, T. and Hauenstein, F. and Higinbotham, D. W. and Holt, R. J. and Kutz, T. and Li, S. and Liu, H. and McClellan, R. E. and Nycz, M. and Nguyen, D. and Pandey, B. and Pandey, V. and Schmidt, A. and Su, T. and Ye, Z.},
abstractNote = {A system of modular sealed gas target cells has been developed for use in electron scattering experiments at the Thomas Jefferson National Accelerator Facility (Jefferson Lab). This system was initially developed to complete the MARATHON experiment which required, among other species, tritium as a target material. Thus far, the cells have been loaded with the gas species 3H, 3He, 2H, 1H and 40Ar and operated in nominal beam currents of up to 22.5 μA in Jefferson Lab's Hall A. While the gas density of the cells at the time of loading is known, the density of each gas varies uniquely when heated by the electron beam. To extract experimental cross sections using these cells, density dependence on beam current of each target fluid must be determined. In this study, data from measurements with several beam currents within the range of 2.5 to 22.5 μA on each target fluid are presented. In addition, expressions for the beam current dependent fluid density of each target are developed.},
doi = {10.1016/j.nima.2019.06.025},
journal = {Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment},
number = ,
volume = ,
place = {United States},
year = {2019},
month = {6}
}

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