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Title: Initial Search for 9-keV XTR from a 28-GeV Beam at SPPS

Abstract

The potential to use x-ray transition radiation (XTR) as a beam diagnostic and coherent XTR (CXTR) as a gain diagnostic in an x-ray FEL was proposed previously. At that time we noted that the unique configuration of the SLAC Sub-picosecond Photon Source (SPPS) with its known x-ray wiggler source, a special three-element x-ray monochromator, x-ray transport line, and experimental end station with x-ray detectors made it an ideal location for an XTR feasibility experiment. Estimates of the XTR compared to the SPPS source strength were done, and initial experiments were performed in September 2005. Complementary measurements on optical transition radiation (OTR) far-field images from a 7-GeV beam are also discussed.

Authors:
; ; ; ; ;
Publication Date:
Research Org.:
Stanford Linear Accelerator Center (SLAC)
Sponsoring Org.:
USDOE
OSTI Identifier:
902493
Report Number(s):
SLAC-PUB-12451
TRN: US0702855
DOE Contract Number:
AC02-76SF00515
Resource Type:
Conference
Resource Relation:
Conference: Prepared for 28th International Free Electron Laser Conference (FEL 2006), Berlin, Germany, 27 Aug - 1 Sep 2006
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; CONFIGURATION; FREE ELECTRON LASERS; PHOTONS; STANFORD LINEAR ACCELERATOR CENTER; TRANSITION RADIATION; TRANSPORT; Accelerators,XFEL

Citation Formats

Lumpkin, A.H., /Argonne, Hastings, J.B., /SLAC, Rule, D.W., and /Naval Surface Warfare Ctr. Initial Search for 9-keV XTR from a 28-GeV Beam at SPPS. United States: N. p., 2007. Web.
Lumpkin, A.H., /Argonne, Hastings, J.B., /SLAC, Rule, D.W., & /Naval Surface Warfare Ctr. Initial Search for 9-keV XTR from a 28-GeV Beam at SPPS. United States.
Lumpkin, A.H., /Argonne, Hastings, J.B., /SLAC, Rule, D.W., and /Naval Surface Warfare Ctr. Mon . "Initial Search for 9-keV XTR from a 28-GeV Beam at SPPS". United States. doi:. https://www.osti.gov/servlets/purl/902493.
@article{osti_902493,
title = {Initial Search for 9-keV XTR from a 28-GeV Beam at SPPS},
author = {Lumpkin, A.H. and /Argonne and Hastings, J.B. and /SLAC and Rule, D.W. and /Naval Surface Warfare Ctr.},
abstractNote = {The potential to use x-ray transition radiation (XTR) as a beam diagnostic and coherent XTR (CXTR) as a gain diagnostic in an x-ray FEL was proposed previously. At that time we noted that the unique configuration of the SLAC Sub-picosecond Photon Source (SPPS) with its known x-ray wiggler source, a special three-element x-ray monochromator, x-ray transport line, and experimental end station with x-ray detectors made it an ideal location for an XTR feasibility experiment. Estimates of the XTR compared to the SPPS source strength were done, and initial experiments were performed in September 2005. Complementary measurements on optical transition radiation (OTR) far-field images from a 7-GeV beam are also discussed.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Mon Apr 16 00:00:00 EDT 2007},
month = {Mon Apr 16 00:00:00 EDT 2007}
}

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  • The potential to use x-ray transition radiation (XTR) as a beam diagnostic and coherent XTR (CXTR) as a gain diagnostic in an x-ray FEL was proposed previously. At that time we noted that the unique configuration of the SLAC Sub-picosecond Photon Source (SPPS) with its known x-ray wiggler source, a special three-element x-ray monochromator, x-ray transport line, and experimental end station with x-ray detectors made it an ideal location for an XTR feasibility experiment. Estimates of the XTR compared to the SPPS source strength were done, and initial experiments were performed in September 2005. Complementary measurements on optical transition radiationmore » (OTR) far-field images from a 7-GeV beam are also discussed.« less
  • Three experiments that were run concurrently at the Brookhaven AGS are reviewed and compared. The experiments searched for prompt neutrinos and penetrating neutral particles from a beam dump exposed to 4.2 x 10/sup 18/ 28 GeV/c protons. Some indications of unusual production mechanisms have been reported.
  • We have measured gamma-ray spectra from the 565-keV p/sub 3/2/-wave neutron resonance capture by /sup 28/Si and from the off-resonance capture at 485 keV with an anti-Compton NaI(T1) detector. The resonance capture gamma-ray spectrum cannot be reproduced by the valence model. On the other hand, the off-resonance neutron capture gamma-ray spectrum is successfully explained by the direct capture model.
  • We report on molecular desorption of baked stainless steel from irradiation with high energy ions under perpendicular impact. Ion induced molecular desorption has affected the performance of a number of ion accelerators, in which the beam loss typically occurs under small angles. However, experimental parameters can be easier controlled in measurements with perpendicular impact. Desorption coefficients for small angle impact can be estimated from these measurements. The measurements were carried out at Brookhaven's Relativistic Heavy Ion Collider.
  • We present and discuss data on the yields of deuterons with energies from 90 to 250 MeV from nuclei bombarded by hadrons. For the reactions pA..-->..dX (at initial momentum 7.5 GeV/c) and ..pi../sup -/A..-->..dX (at initial momentum 5 GeV/c) we have measured in detail the angular dependence of the inclusive cross sections for production of deuterons from the nuclei C, Cu, Pb, and U. The range of angles was 10--160/sup 0/. The A-dependence of the deuteron yields from Be, C, Al, Ti, Fe, Cu, Nb, Cd, Sn, Ta, Pb, and U was measured in detail for initial protons with momentummore » 7.5 GeV/c at four emission angles 60, 90, 120, and 160/sup 0/. For the same angles we studied the dependence of the deuteron yields on the initial momentum of protons in the range 1.4--9.0 GeV/c, on the initial momenta of ..pi../sup +/ in the range 1.4--6.0 GeV/c, and of ..pi../sup -/ of 1.4 and 5.0 GeV/c. The behavior of the cross sections for production of deuterons as a function of the emission angle, the atomic weight of the target nucleus, and the initial momentum is similar in many ways to the behavior of the cross sections for production of protons; in particular, the same regularities of the yield with respect to scaling are characteristic for deuterons.« less