Multipass beam position, profile and polarization measurements using intense photon target

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The Compton scattering of a circularly polarized laser beam condensed by an optical resonator can be used for multipass measurement of beam profile, position, and polarization in CEBAF's 250-m-long linac straight sections. The position and profile of the beam will be measured with an accuracy of {approximately}10 {mu}m in about 200 seconds and beam polarization with 10% accuracy in 100 seconds when the lowest beam energy is 500 MeV and the beam current is 100 {mu}A. For higher energies the times for measurement are much less. The photon target is within an optical resonator having a quality factor of 50. ... continued below

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Karabekov, I.P.; Neil, G.; Karabekian, S. & Musakhanian, V. May 1, 1994.

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The Compton scattering of a circularly polarized laser beam condensed by an optical resonator can be used for multipass measurement of beam profile, position, and polarization in CEBAF's 250-m-long linac straight sections. The position and profile of the beam will be measured with an accuracy of {approximately}10 {mu}m in about 200 seconds and beam polarization with 10% accuracy in 100 seconds when the lowest beam energy is 500 MeV and the beam current is 100 {mu}A. For higher energies the times for measurement are much less. The photon target is within an optical resonator having a quality factor of 50. The Nd:Yag 5 W CW laser photon beam at wavelength {lambda} = 0.532 nm will have a waist {omega}{sub o} {approximately}30 {mu}m and a Rayleigh range of about 10 mm. Scanning the electron beams in the linac sections by this photon beam at a crossing angle of 0.1 rad will send to a proportional detector installed after the spreader magnet scattered photons with energies sharply correlated with the energy of the electrons.

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160 Kilobytes pages

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  • Report No.: CEBAF-PR-94-004
  • Report No.: DOE/ER/40150-1642
  • Grant Number: AC05-84ER40150
  • Office of Scientific & Technical Information Report Number: 756864
  • Archival Resource Key: ark:/67531/metadc702741

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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  • May 1, 1994

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  • Sept. 12, 2015, 6:31 a.m.

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  • Feb. 5, 2016, 9:49 p.m.

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Karabekov, I.P.; Neil, G.; Karabekian, S. & Musakhanian, V. Multipass beam position, profile and polarization measurements using intense photon target, article, May 1, 1994; Newport News, Virginia. (digital.library.unt.edu/ark:/67531/metadc702741/: accessed October 21, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.