Beam dynamics enhancement due to accelerating field symmetrization in the BNL/SLAC/UCLA 1.6 cell S-Band photocathode RF gun

D. T. Palmer; X. J. Wang; I. Ben-Zvi; R. H. Miller

Beam dynamics enhancement due to accelerating field symmetrization in the BNL/SLAC/UCLA 1.6 cell S-Band photocathode RF gun

D. T. Palmer
, X. J. Wang
, I. Ben-Zvi
, R. H. Miller

Physics and Astronomy

Stanford University

Research output: Contribution to conference › Paper › peer-review

11 Scopus citations

Abstract

A 1.6 cell photocathode S-Band gun developed by the BNL/SLAC/UCLA collaboration is now in operation at the Brookhaven Accelerator Test Facility (ATF). One of the main features of this RF gun is the symmetrization of the RF coupling iris with a identical vacuum pumping port located in the full cell. The effects of the asymmetry caused by the RF coupling iris were experimentally investigated by positioning a metallic plunger at the back wall of the vacuum port iris. The higher order modes produced were studied using electron beamlets with 8-fold symmetry. The 8-fold beamlets were produced by masking the laser beam. These experimental results indicate that the integrated electrical center and the geometrical center of the gun are within 175 μm. Which is within the laser alignment tolerance of 250μm.

Original language	English
Pages	2846-2848
Number of pages	3
State	Published - 1998
Event	Proceedings of the 1997 17th Particle Accelerator Conference, PAC-97 - Vancouver, BC, CAN Duration: May 12 1997 → May 16 1997

Conference

Conference	Proceedings of the 1997 17th Particle Accelerator Conference, PAC-97
City	Vancouver, BC, CAN
Period	05/12/97 → 05/16/97

Cite this

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title = "Beam dynamics enhancement due to accelerating field symmetrization in the BNL/SLAC/UCLA 1.6 cell S-Band photocathode RF gun",

abstract = "A 1.6 cell photocathode S-Band gun developed by the BNL/SLAC/UCLA collaboration is now in operation at the Brookhaven Accelerator Test Facility (ATF). One of the main features of this RF gun is the symmetrization of the RF coupling iris with a identical vacuum pumping port located in the full cell. The effects of the asymmetry caused by the RF coupling iris were experimentally investigated by positioning a metallic plunger at the back wall of the vacuum port iris. The higher order modes produced were studied using electron beamlets with 8-fold symmetry. The 8-fold beamlets were produced by masking the laser beam. These experimental results indicate that the integrated electrical center and the geometrical center of the gun are within 175 μm. Which is within the laser alignment tolerance of 250μm.",

author = "Palmer, \{D. T.\} and Wang, \{X. J.\} and I. Ben-Zvi and Miller, \{R. H.\}",

year = "1998",

language = "English",

pages = "2846--2848",

note = "Proceedings of the 1997 17th Particle Accelerator Conference, PAC-97 ; Conference date: 12-05-1997 Through 16-05-1997",

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TY - CONF

T1 - Beam dynamics enhancement due to accelerating field symmetrization in the BNL/SLAC/UCLA 1.6 cell S-Band photocathode RF gun

AU - Palmer, D. T.

AU - Wang, X. J.

AU - Ben-Zvi, I.

AU - Miller, R. H.

PY - 1998

Y1 - 1998

N2 - A 1.6 cell photocathode S-Band gun developed by the BNL/SLAC/UCLA collaboration is now in operation at the Brookhaven Accelerator Test Facility (ATF). One of the main features of this RF gun is the symmetrization of the RF coupling iris with a identical vacuum pumping port located in the full cell. The effects of the asymmetry caused by the RF coupling iris were experimentally investigated by positioning a metallic plunger at the back wall of the vacuum port iris. The higher order modes produced were studied using electron beamlets with 8-fold symmetry. The 8-fold beamlets were produced by masking the laser beam. These experimental results indicate that the integrated electrical center and the geometrical center of the gun are within 175 μm. Which is within the laser alignment tolerance of 250μm.

AB - A 1.6 cell photocathode S-Band gun developed by the BNL/SLAC/UCLA collaboration is now in operation at the Brookhaven Accelerator Test Facility (ATF). One of the main features of this RF gun is the symmetrization of the RF coupling iris with a identical vacuum pumping port located in the full cell. The effects of the asymmetry caused by the RF coupling iris were experimentally investigated by positioning a metallic plunger at the back wall of the vacuum port iris. The higher order modes produced were studied using electron beamlets with 8-fold symmetry. The 8-fold beamlets were produced by masking the laser beam. These experimental results indicate that the integrated electrical center and the geometrical center of the gun are within 175 μm. Which is within the laser alignment tolerance of 250μm.

UR - https://www.scopus.com/pages/publications/0032279717

M3 - Paper

AN - SCOPUS:0032279717

SP - 2846

EP - 2848

T2 - Proceedings of the 1997 17th Particle Accelerator Conference, PAC-97

Y2 - 12 May 1997 through 16 May 1997

ER -

Beam dynamics enhancement due to accelerating field symmetrization in the BNL/SLAC/UCLA 1.6 cell S-Band photocathode RF gun

Abstract

Conference

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