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Title: Argonne Wakefield Accelerator Update '92

Abstract

The Argonne Wakefield Accelerator (AWA) is an experiment designed to test various ideas related to wakefield technology. Construction is now underway for a 100 nC electron beam in December of 1992. This report updates this progress.

Authors:
; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Argonne National Lab., IL (United States)
Sponsoring Org.:
USDOE; USDOE, Washington, DC (United States)
OSTI Identifier:
7077895
Report Number(s):
ANL-HEP-CP-92-65; CONF-9208109-50
ON: DE92019733
DOE Contract Number:
W-31109-ENG-38
Resource Type:
Conference
Resource Relation:
Conference: 16. international LINAC conference, Ottawa (Canada), 23-28 Aug 1992
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; WAKEFIELD ACCELERATORS; DESIGN; PHOTOCATHODES; ACCELERATORS; CATHODES; ELECTRODES; LINEAR ACCELERATORS; 430100* - Particle Accelerators- Design, Development, & Operation

Citation Formats

Rosing, M., Balka, L., Chojnacki, E., Gai, W., Ho, C., Konecny, R., Power, J., Schoessow, P., and Simpson, J.. Argonne Wakefield Accelerator Update '92. United States: N. p., 1992. Web.
Rosing, M., Balka, L., Chojnacki, E., Gai, W., Ho, C., Konecny, R., Power, J., Schoessow, P., & Simpson, J.. Argonne Wakefield Accelerator Update '92. United States.
Rosing, M., Balka, L., Chojnacki, E., Gai, W., Ho, C., Konecny, R., Power, J., Schoessow, P., and Simpson, J.. Wed . "Argonne Wakefield Accelerator Update '92". United States. doi:. https://www.osti.gov/servlets/purl/7077895.
@article{osti_7077895,
title = {Argonne Wakefield Accelerator Update '92},
author = {Rosing, M. and Balka, L. and Chojnacki, E. and Gai, W. and Ho, C. and Konecny, R. and Power, J. and Schoessow, P. and Simpson, J.},
abstractNote = {The Argonne Wakefield Accelerator (AWA) is an experiment designed to test various ideas related to wakefield technology. Construction is now underway for a 100 nC electron beam in December of 1992. This report updates this progress.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Wed Jan 01 00:00:00 EST 1992},
month = {Wed Jan 01 00:00:00 EST 1992}
}

Conference:
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  • The Argonne Wakefield Accelerator (AWA) is an experiment designed to test various ideas related to wakefield technology. Construction is now underway for a 100 nC electron beam in December of 1992. This report updates this progress.
  • The Argonne Wakefield Accelerator (AWA) is a facility designed to investigate high gradient wakefield acceleration techniques. Wakefields are excited using a drive beam produced by a 14 MeV high current photoinjector-based linac. A second photocathode gun generates a 4 MeV witness beam which is used as a probe of the wakefields in the device under test. The delay of the witness bunch with respect to the drive bunch can be continuously varied from -100 ps to >1 ns. The drive and witness bunches propagate along collinear or parallel trajectories through the test section. A dipole spectrometer is then used tomore » measure the energy change of the witness beam. The complete wakefield measurement system has been commissioned and wakefield experiments using dielectric structures are underway. Initial experiments have focused on collinear wakefield device geometries where the drive and witness bunches traverse the same structure. For attaining very high gradients we will construct and study step-up transformer structures in which the rf pulse generated by the drive beam is compressed transversely and longitudinally.« less
  • The Argonne Wakefield Accelerator (AWA) is a new facility for advanced accelerator research. A major component of the AWA is its drive linac, consisting of a unique high current short pulse L-Band photocathode based gun and special standing wave preaccelerator designed to produce 100 nC, 30 ps electron bunches at 20 MeV. Commissioning on the drive linac is now underway. We report on our initial operating experience with this novel machine, including bunch length and emittance measurements.
  • The witness gun for the Argonne Wakefield Accelerator (AWA) is a six-cell, copper, iris loaded, rf photocathode operating at 1.3 GHz in a {pi}/2 standing wave mode. An intense drive beam (up to 100 nC {at} 20 psec FWHM) used in the AWA project to excite (i.e. drive) wakefields in at least two separate test devices: a dielectric loaded cylindrical waveguide and a plasma cell. In both cases a low charge, low emittance witness beam (0.1 nC charge, 1 {pi}mm-mrad 90% physical emittance) is required to probe (i.e. witness) the wakefields left behind by the drive beam. This paper willmore » primarily discuss the recent progress in the construction of the witness gun, while also briefly summarizing the central design issues of the gun. A brief status report on the dielectric witness gun option is also included. The authors conclude with a short statement on the near term future plans.« less
  • The Argonne Wakefield Accelerator facility has begun its experimental program. It is designed to address advanced acceleration research requiring very short, intense electron bunches. It incorporates two photocathode based electron sources. One produces up to 100 nC, multi-kiloamp `drive` bunches which are used to excite wakefields in dielectric loaded structures and in plasma. The second source produces much lower intensity `witness` pulses which are used to probe the fields produced by the drive. The drive and witness pulses can be precisely timed as well as laterally positioned with respect to each other. This paper discusses commissioning, initial experiments, and outlinemore » plans for a proposed 1 GeV demonstration accelerator.« less