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Title: Initial OTR measurements of 150 GeV protons in the Tevatron at FNAL

Abstract

Fermilab has developed standard optical transition radiation (OTR) detectors as part of its Run II upgrade program for measuring intense proton and antiproton beams. These detectors utilize radiation-hardened CID cameras to image the OTR and produce high-resolution two-dimensional beam profiles. One of these detectors has been installed in the Tevatron next to the new ionization profile monitor (IPM). Initial OTR measurements are presented for 150 GeV injected coalesced and uncoalesced proton bunches. OTR images are taken for one-turn and two-turn injections over an intensity range of 1.5e11 to 3.5e11 protons. Preliminary profile measurements give uncoalesced beam size sigmas of 1.0 mm horizontally by 0.7 mm vertically and coalesced beam size sigmas of 1.8 mm horizontally by 0.70 mm vertically. OTR images are also presented for changes in the Tevatron skew quadrupole magnet currents, which produce a rotation to the OTR image, and for changes to the Tevatron RF, which can be used to measure single-turn dispersion. Operational aspects of this detector for beam studies and Tevatron tuneup are also discussed.

Authors:
; ; ; ; ;
Publication Date:
Research Org.:
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
892270
Report Number(s):
FERMILAB-CONF-06-103-AD
TRN: US0701372
DOE Contract Number:
AC02-76CH03000
Resource Type:
Conference
Resource Relation:
Journal Name: AIP Conf.Proc.868:473-480,2006; Conference: Presented at 12th Beam Instrumentation Workshop (BIW06), Fermilab, Batavia, Illinois, 1-4 May 2006
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; ANTIPROTON BEAMS; BEAM PROFILES; CAMERAS; FERMILAB; FERMILAB TEVATRON; IONIZATION; MAGNETS; MONITORS; PROTONS; QUADRUPOLES; ROTATION; TRANSITION RADIATION; Accelerators

Citation Formats

Scarpine, V.E., /Fermilab, Lumpkin, A.H., /Argonne, Tassotto, G.R., and /Fermilab. Initial OTR measurements of 150 GeV protons in the Tevatron at FNAL. United States: N. p., 2006. Web.
Scarpine, V.E., /Fermilab, Lumpkin, A.H., /Argonne, Tassotto, G.R., & /Fermilab. Initial OTR measurements of 150 GeV protons in the Tevatron at FNAL. United States.
Scarpine, V.E., /Fermilab, Lumpkin, A.H., /Argonne, Tassotto, G.R., and /Fermilab. Mon . "Initial OTR measurements of 150 GeV protons in the Tevatron at FNAL". United States. doi:. https://www.osti.gov/servlets/purl/892270.
@article{osti_892270,
title = {Initial OTR measurements of 150 GeV protons in the Tevatron at FNAL},
author = {Scarpine, V.E. and /Fermilab and Lumpkin, A.H. and /Argonne and Tassotto, G.R. and /Fermilab},
abstractNote = {Fermilab has developed standard optical transition radiation (OTR) detectors as part of its Run II upgrade program for measuring intense proton and antiproton beams. These detectors utilize radiation-hardened CID cameras to image the OTR and produce high-resolution two-dimensional beam profiles. One of these detectors has been installed in the Tevatron next to the new ionization profile monitor (IPM). Initial OTR measurements are presented for 150 GeV injected coalesced and uncoalesced proton bunches. OTR images are taken for one-turn and two-turn injections over an intensity range of 1.5e11 to 3.5e11 protons. Preliminary profile measurements give uncoalesced beam size sigmas of 1.0 mm horizontally by 0.7 mm vertically and coalesced beam size sigmas of 1.8 mm horizontally by 0.70 mm vertically. OTR images are also presented for changes in the Tevatron skew quadrupole magnet currents, which produce a rotation to the OTR image, and for changes to the Tevatron RF, which can be used to measure single-turn dispersion. Operational aspects of this detector for beam studies and Tevatron tuneup are also discussed.},
doi = {},
journal = {AIP Conf.Proc.868:473-480,2006},
number = ,
volume = ,
place = {United States},
year = {Mon May 01 00:00:00 EDT 2006},
month = {Mon May 01 00:00:00 EDT 2006}
}

Conference:
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  • Fermilab has developed standard optical transition radiation (OTR) detectors as part of its Run II upgrade program for measuring intense proton and antiproton beams. These detectors utilize radiation-hardened CID cameras to image the OTR and produce high-resolution two-dimensional beam profiles. One of these detectors has been installed in the Tevatron next to the new ionization profile monitor (IPM). Initial OTR measurements are presented for 150 GeV injected coalesced and uncoalesced proton bunches. OTR images are taken for one-turn and two-turn injections over an intensity range of 1.5e11 to 3.5e11 protons. Preliminary profile measurements give uncoalesced beam size sigmas of 1.0more » mm horizontally by 0.7 mm vertically and coalesced beam size sigmas of 1.8 mm horizontally by 0.7 mm vertically. OTR images are also presented for changes in the Tevatron skew quadrupole magnet currents, which produce a rotation to the OTR image, and for changes to the Tevatron RF, which can be used to measure single-turn dispersion. Operational aspects of this detector for beam studies and Tevatron tune-up are also discussed.« less
  • We have successfully imaged for the first time the angular distribution patterns of optical transition radiation (OTR) generated by 120-GeV proton beams passing through an Al metal plane. These experiments were performed at Fermilab (FNAL) with the same chamber, foil, and camera design as with the near-field experiments previously reported. In this case the lens-to-CID-chip separation was remotely adjusted to provide the focus-at- infinity, or far-field optical imaging. Data have been obtained in transport lines both before the antiproton production target and before the NuMI target with particle intensities of about 5 to 22 times 10{sup 12}. A two-foil interferometermore » calculation was also performed. Single-foil experimental and modeling results will be presented.« less
  • No abstract prepared.
  • Fermi National Accelerator Laboratory (FNAL) is developing optical transition radiation (OTR) detectors for beam diagnostics for their 120-GeV proton and antiproton transfer lines. As part of a collaboration to enhance the luminosity for the FNAL collider RUN II program, the quality of the proton and antiproton beams, as they are transported from the main injector (MI) to the Tevatron, will be characterized using OTR imaging techniques. A prototype detector in air has already successfully acquired OTR images of 120-GeV protons upstream of the antiproton production target. This result demonstrates that (i) the Ti and Al thin foil screens survive themore » 5 x 1012 proton beam spills, (ii) OTR is sufficient to image lower intensity antiproton beams, and (iii) the images provide two-dimensional information and higher resolution than the present multi-wire profile monitors in the transport lines. Beam bombardment effects on the Al screen and radiation effects on the lenses, filters and cameras have been evaluated for the prototype system for over 1 x 1019 120-GeV protons and will also be presented. An in-vacuum OTR station is being designed for the transport lines with adjustments to the optical components as warranted by the beam characteristics and anticipated radiation environment.« less