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Title: X-Band RF Photoinjector Research And Development at LLNL

Authors:
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Publication Date:
Research Org.:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1278192
Report Number(s):
SLAC-PUB-16676
DOE Contract Number:
AC02-76SF00515
Resource Type:
Conference
Resource Relation:
Journal Name: Conf.Proc.C110328:859-861,2011; Conference: Particle Accelerator, 24th Conference (PAC'11) 28 Mar - 1 Apr 2011, New York, USA
Country of Publication:
United States
Language:
English
Subject:
Accelerators,ACCPHY

Citation Formats

Marsh, R.A., Anderson, S.G., Beer, G., Cross, R.R., Deis, G.A., Ebbers, C.A., Gibson, D.J., Hartemann, F.V., Houck, T.L., Barty, C.P.J., Adolphsen, C., Candel, A., Chu, T.S., Jongewaard, E.N., Li, Z., Limborg-Deprey, C., Tantawi, S.G., Vlieks, A.E., Wang, F., Wang, J.W., Zhou, F., and /SLAC. X-Band RF Photoinjector Research And Development at LLNL. United States: N. p., 2016. Web.
Marsh, R.A., Anderson, S.G., Beer, G., Cross, R.R., Deis, G.A., Ebbers, C.A., Gibson, D.J., Hartemann, F.V., Houck, T.L., Barty, C.P.J., Adolphsen, C., Candel, A., Chu, T.S., Jongewaard, E.N., Li, Z., Limborg-Deprey, C., Tantawi, S.G., Vlieks, A.E., Wang, F., Wang, J.W., Zhou, F., & /SLAC. X-Band RF Photoinjector Research And Development at LLNL. United States.
Marsh, R.A., Anderson, S.G., Beer, G., Cross, R.R., Deis, G.A., Ebbers, C.A., Gibson, D.J., Hartemann, F.V., Houck, T.L., Barty, C.P.J., Adolphsen, C., Candel, A., Chu, T.S., Jongewaard, E.N., Li, Z., Limborg-Deprey, C., Tantawi, S.G., Vlieks, A.E., Wang, F., Wang, J.W., Zhou, F., and /SLAC. 2016. "X-Band RF Photoinjector Research And Development at LLNL". United States. doi:. https://www.osti.gov/servlets/purl/1278192.
@article{osti_1278192,
title = {X-Band RF Photoinjector Research And Development at LLNL},
author = {Marsh, R.A. and Anderson, S.G. and Beer, G. and Cross, R.R. and Deis, G.A. and Ebbers, C.A. and Gibson, D.J. and Hartemann, F.V. and Houck, T.L. and Barty, C.P.J. and Adolphsen, C. and Candel, A. and Chu, T.S. and Jongewaard, E.N. and Li, Z. and Limborg-Deprey, C. and Tantawi, S.G. and Vlieks, A.E. and Wang, F. and Wang, J.W. and Zhou, F. and /SLAC},
abstractNote = {},
doi = {},
journal = {Conf.Proc.C110328:859-861,2011},
number = ,
volume = ,
place = {United States},
year = 2016,
month = 7
}

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  • In support of X-band photoinjector development efforts at LLNL, a 50 MW test station is being constructed to investigate structure and photocathode optimization for future upgrades. A SLAC XL-4 klystron capable of generating 50 MW, 1.5 microsecond pulses will be the high power RF source for the system. Timing of the laser pulse on the photocathode with the applied RF field places very stringent requirements on phase jitter and drift. To achieve these requirements, the klystron will be powered by a state of the art, solid-state, high voltage modulator. The 50 MW will be divided between the photoinjector and amore » traveling wave accelerator section. A high power phase shifter is located between the photoinjector and accelerator section to adjust the phasing of the electron bunches with respect to the accelerating field. A variable attenuator is included on the input of the photoinjector. The distribution system including the various x-band components is being designed and constructed. In this paper, we will present the design, layout, and status of the RF system.« less
  • The National Ignition Facility is operational at LLNL. The ICF and HED programs at LLNL have formed diagnostic research and development groups to institute improvements outside the charter of core diagnostics. We will present data from instrumentation being developed. A major portion of our work is improvements to detectors and readout systems. We have efforts related to CCD device development. Work has been done in collaboration with the University of Arizona to back thin a large format CCD device. We have developed in collaboration with a commercial vendor a large format, compact CCD system. We have coupled large format CCDmore » systems to our optical and x-ray streak cameras leading to improvements in resolution and dynamic range. We will discuss gate-width and uniformity improvements to MCP-based framing cameras. We will present data from single shot data link work and discuss technology aimed at improvements of dynamic range for high-speed transient measurements from remote locations.« less
  • The study of electron-positron (e/sup +/e/sup /minus//) annihilation in storage ring colliders has been very fruitful. It is by now well understood that the optimized cost and size of e/sup +/e/sup /minus// storage rings scales as E(sub cm//sup 2/ due to the need to replace energy lost to synchrotron radiation in the ring bending magnets. Linear colliders, using the beams from linear accelerators, evade this scaling law. The study of e/sup +/e/sup /minus// collisions at TeV energy will require linear colliders. The luminosity requirements for a TeV linear collider are set by the physics. Advanced accelerator research and development atmore » SLAC is focused toward a TeV Linear Collider (TLC) of 0.5--1 TeV in the center of mass, with a luminosity of 10/sup 33/--10/sup 34/. The goal is a design for two linacs of less than 3 km each, and requiring less than 100 MW of power each. With a 1 km final focus, the TLC could be fit on Stanford University land (although not entirely within the present SLAC site). The emphasis is on technologies feasible for a proposal to be framed in 1992. Linear collider development work is progressing on three fronts: delivering electrical energy to a beam, delivering a focused high quality beam, and system optimization. Sources of high peak microwave radio frequency (RF) power to drive the high gradient linacs are being developed in collaboration with Lawrence Berkeley Laboratory (LBL) and Lawrence Livermore National Laboratory (LLNL). Beam generation, beam dynamics and final focus work has been done at SLAC and in collaboration with KEK. Both the accelerator physics and the utilization of TeV linear colliders were topics at the 1988 Snowmass Summer Study. 14 refs., 4 figs., 1 tab.« less