Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10716289 | Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment | 2005 | 11 Pages |
Abstract
In its normal mode of operation, the Argonne Wakefield Accelerator Facility uses a high charge (10-100Â nC), short pulse (3-5Â ps) drive bunch to excite high-gradient accelerating fields in various slow-wave structures. To generate this bunch, we designed a 1.5Â cell, L-band, rf photocathode gun with an emittance compensating solenoid to give optimal performance at high charge; it has recently completed commissioning. More recently, we have begun to investigate the possibility of using this gun in a high-brightness, low-charge operating mode, with charge equal to approximately 1Â nC, for high-precision measurements of wakefields. Two related measurements are reported on in this paper: (1) measurements of the transverse beam envelope are compared to predictions from the beam dynamics code PARMELA; and (2) investigations into the use of a modified 3-screen emittance measurement method that uses a beam envelope model that includes both space-charge and emittance effects. Both measurements were made for the 1Â nC, 8Â MeV beam in the drift region directly following the rf photocathode gun.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Instrumentation
Authors
J.G. Power, H. Wang, M.E. Conde, W. Gai, R. Konecny, W. Liu, Z. Yusof,