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Title: Experimental results of a single emittance compensation solenoidal magnet

Abstract

A new iron dominated single emittance compensation solenoidal magnet was designed to be integrated with the BNL/SLAC/UCLA 1.6 cell S-Band Photocathode rf Gun. This emittance compensated photoinjector is now in operation at the Brookhaven Accelerator Test Facility. It has produced a 0.329 {+-} 0.012 pC, {tau}{sub 95%} = 10.9 psec electron bunches with a normalized rms transverse emittance of {epsilon}{sub n,rms} = 1.17 {+-} 0.16 {pi} mm mrad. POISSON field maps were used with PARMELA to optimize the emittance compensation solenoidal magnet design. Magnetic field measurements show that at the cathode plane B{sub z} {le} 10 G for a peak magnetic field of B{sub z,max} = 3 kG. Which is in agreement with POISSON simulation. A single emittance compensation solenoidal magnet will produces an initial angular momentum of the electron bunch that manifests itself in a initial magnetic emittance term that cannot be eliminated. This magnetic emittance {epsilon}{sub n,rms}{sup mag} scales as 0.010 {pi} mm mrad/G as the cathode, which is in agreement with PARMELA simulations. Experimental beam dynamics results are presented that shows relative angular rotation and spot size as a function of cathode magnetic field. These results are compared to theory.

Authors:
;  [1]; ; ;  [2]
  1. Stanford Linear Accelerator Center, Menlo Park, CA (United States)
  2. Brookhaven National Lab., Upton, NY (United States). Accelerator Test Facility
Publication Date:
Research Org.:
Brookhaven National Lab. (BNL), Upton, NY (United States); SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Org.:
USDOE Office of Energy Research, Washington, DC (United States)
OSTI Identifier:
495800
Report Number(s):
BNL-64469; CONF-970503-75
ON: DE97006718; TRN: 97:013246
DOE Contract Number:  
AC02-76CH00016; AC03-76SF00515
Resource Type:
Conference
Resource Relation:
Conference: 17. IEEE particle accelerator conference, Vancouver (Canada), 12-16 May 1997; Other Information: PBD: [1997]
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; ELECTROMAGNETS; ELECTRON GUNS; BEAM EMITTANCE; BEAM INJECTION; TEST FACILITIES; ACCELERATORS; DESIGN

Citation Formats

Palmer, D T, Miller, R H, Wang, X J, Ben-Zvi, I, and Skaritka, J. Experimental results of a single emittance compensation solenoidal magnet. United States: N. p., 1997. Web.
Palmer, D T, Miller, R H, Wang, X J, Ben-Zvi, I, & Skaritka, J. Experimental results of a single emittance compensation solenoidal magnet. United States.
Palmer, D T, Miller, R H, Wang, X J, Ben-Zvi, I, and Skaritka, J. 1997. "Experimental results of a single emittance compensation solenoidal magnet". United States. https://www.osti.gov/servlets/purl/495800.
@article{osti_495800,
title = {Experimental results of a single emittance compensation solenoidal magnet},
author = {Palmer, D T and Miller, R H and Wang, X J and Ben-Zvi, I and Skaritka, J},
abstractNote = {A new iron dominated single emittance compensation solenoidal magnet was designed to be integrated with the BNL/SLAC/UCLA 1.6 cell S-Band Photocathode rf Gun. This emittance compensated photoinjector is now in operation at the Brookhaven Accelerator Test Facility. It has produced a 0.329 {+-} 0.012 pC, {tau}{sub 95%} = 10.9 psec electron bunches with a normalized rms transverse emittance of {epsilon}{sub n,rms} = 1.17 {+-} 0.16 {pi} mm mrad. POISSON field maps were used with PARMELA to optimize the emittance compensation solenoidal magnet design. Magnetic field measurements show that at the cathode plane B{sub z} {le} 10 G for a peak magnetic field of B{sub z,max} = 3 kG. Which is in agreement with POISSON simulation. A single emittance compensation solenoidal magnet will produces an initial angular momentum of the electron bunch that manifests itself in a initial magnetic emittance term that cannot be eliminated. This magnetic emittance {epsilon}{sub n,rms}{sup mag} scales as 0.010 {pi} mm mrad/G as the cathode, which is in agreement with PARMELA simulations. Experimental beam dynamics results are presented that shows relative angular rotation and spot size as a function of cathode magnetic field. These results are compared to theory.},
doi = {},
url = {https://www.osti.gov/biblio/495800}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Jul 01 00:00:00 EDT 1997},
month = {Tue Jul 01 00:00:00 EDT 1997}
}

Conference:
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