2011 Particle Accelerator Conference - List of Keywords (site)

Paper	Title	Other Keywords	Page
MOP071	Terahertz Light Source and User Area at FACET	radiation, electron, photon, linac	238
	Z. Wu, A.S. Fisher, M.J. Hogan, S.Z. Li, M.D. Litos SLAC, Menlo Park, California, USA
	Funding: Work supported by the U.S. Department of Energy under contract number DE-AC02-76SF00515. FACET at SLAC provides high charge, high peak current, low emittance electron beam that is bunched at THz wavelength scale during its normal operation. A THz light source based coherent transition radiation (CTR) from this beam would potentially be the brightest short-pulse THz source ever constructed. Efforts have been put into building this photon source together with a user area, to provide a platform to utilize this unique THz radiation for novel nonlinear and ultrafast phenomena researches and experiments.

MOP095	Experimental Determination of Damage Threshold Characteristics of IR Compatible Optical Materials	laser, electron, photon, accelerating-gradient	277
	K. Soong, E.R. Colby, C. McGuinness SLAC, Menlo Park, California, USA R.L. Byer, E.A. Peralta Stanford University, Stanford, California, USA
	Funding: Work funded by DOE contract DE‐AC02‐76SF00515 (SLAC) The accelerating gradient in a laser-driven dielectric accelerating structure is often limited by the laser damage threshold of the structure. For a given laser-driven dielectric accelerator design, we can maximize the accelerating gradient by choosing the best combination of the accelerator’s constituent material and operating wavelength. We present here a model of the damage mechanism from ultrafast infrared pulses and compare that model with experimental measurements of the damage threshold of bulk silicon. Additionally, we present experimental measurements of a variety of candidate materials, thin films, and nanofabricated accelerating structures.

MOP282	A Deterministic, Gigabit Serial Timing, Synchronization and Data Link for the RHIC LLRF	LLRF, controls, diagnostics, target	642
	T. Hayes, F. Severino, K.S. Smith BNL, Upton, Long Island, New York, USA
	Funding: Work supported by Brookhaven Science Associates, LLC under Contract No. DE-AC02-98CH10886 with the U.S. Department of Energy. A critical capability of the new RHIC low level rf system is the ability to synchronize signals across multiple locations. The Update Link provides this functionality. The Update Link is a deterministic serial data link based on the Xilinx Aurora protocol that is broadcast over fiber optic cable at 1 gigabit per second. The link provides timing events and data packets as well as time stamp information for synchronizing diagnostic data from multiple sources.

MOP283	A Hardware Overview of the RHIC LLRF Platform	LLRF, controls, monitoring, status	645
	T. Hayes, K.S. Smith BNL, Upton, Long Island, New York, USA
	Funding: Work supported by Brookhaven Science Associates, LLC under Contract No. DE-AC02-98CH10886 with the U.S. Department of Energy. The RHIC LLRF platform is a flexible, modular system designed around a carrier board with six XMC daughter sites. The carrier board features a Xilinx FPGA with an embedded, hard core Power PC that is remotely reconfigurable. It serves as a front end computer (FEC) that interfaces with the RHIC control system. The carrier provides high speed serial data paths to each daughter site and between daughter sites as well as four generic external fiber optic links. It also distributes low noise clocks and serial data links to all daughter sites and monitors temperature, voltage and current. To date, two XMC cards have been designed: a four channel high speed ADC and a four channel high speed DAC.

TUP019	The S-DALINAC Polarized Injector SPIN - Performance and Results	electron, laser, polarization, linac	853
	C. Eckardt, T. Bahlo, P. Bangert, R. Barday, U. Bonnes, M. Brunken, C. Burandt, R. Eichhorn, J. Enders, M. Espig, C. Ingenhaag, J. Lindemann, M. Platz, Y. Poltoratska, M. Roth, F. Schneider, H. Schüßler, M. Wagner, A. Weber, B. Zwicker TU Darmstadt, Darmstadt, Germany W. Ackermann, W.F.O. Müller, T. Weiland TEMF, TU Darmstadt, Darmstadt, Germany K. Aulenbacher IKP, Mainz, Germany
	Funding: * Work supported by DFG through SFB 634. At the superconducting 130 MeV Darmstadt electron linac S-DALINAC the new source of polarized electrons uses a GaAs cathode illuminated with pulsed Ti:Sapphire and diode laser light. The electron source had been set up and commissioned at a test stand with a beam line where a Wien filter for spin manipulation, a Mott polarimeter for polarization measurement and a chopper-prebuncher system were part of the system. Upon completion of the tests, test stand and beam line were dismantled and re-installed at the S-DALINAC. The new photo injector opens up the potential for experiments with polarized electron and photon beams for nuclear structure studies at low momentum transfers. Various polarimeters will be installed at all experimental sites to monitor the beam polarization. We report on the S-DALINAC, the results from the teststand performance, the implementation of the polarized source and the polarimeter research and development. * A. Richter, Proc. of the 5th EPAC, Sitges (1996) 110 Y. Poltoratska et al., AIP Conference Proc. 1149 (2009) 983 * P. Mohr et al., Nucl. Instr. and Meth. A423 (1999) 480

TUP274	Oak Ridge National Laboratory Spallation Neutron Source Electrical Systems Availability and Improvements	kicker, extraction, injection, pulsed-power	1337
	R.I. Cutler, D.E. Anderson, W.E. Barnett, J.D. Hicks, J.J. Mize, J. Moss, K. Norris, V.V. Peplov, K.R. Rust, J. T. Weaver ORNL, Oak Ridge, Tennessee, USA
	Funding: SNS is managed by UT-Battelle, LLC, under contract DE-AC05-00OR22725 for the U.S. Department of Energy. SNS electrical systems have been operational for 4 years. System availability statistics and improvements are presented for ac electrical systems, dc and pulsed power supplies and klystron modulators

THP163	Pre-Conceptual Design Requirements for an X-Ray Free Electron Laser for the MaRIE Experimental Facility at LANL	photon, electron, linac, FEL	2417
	R.L. Sheffield, C.W. Barnes, M.A. Bourke, R.W. Garnett, M.S. Gulley, A.J. Taylor LANL, Los Alamos, New Mexico, USA
	Funding: Work performed under the auspices of the U.S. Department of Energy, under contract DE-AC52-06NA25396. The MaRIE (Matter-Radiation Interactions in Extremes) experimental facility will be used to advance materials science by providing the tools scientists need to develop materials that will perform predictably and on demand for currently unattainable lifetimes in extreme environments. The MaRIE facilities, the Multi-Probe Diagnostic Hall (MPDH), the Fission and Fusion Materials Facility (F³), and the Making, Measuring, and Modeling Materials (M4) Facility will each have experimental needs for one or more high-energy X-ray beam probes. MPDH will also require access to an electron beam probe. These probe beams can be created using a 20-GeV electron linac, both to serve as a source of electrons and as a driver for a set of up to five X-ray undulators for the high-energy X-rays. Because of space considerations at the facility, a high-gradient design is being investigated that will use a normal-conducting linac and X-band RF systems. Experimental requirements are also calling for relatively long pulse lengths, as well as interleaving high- and low-charge electron bunches. This paper will provide an overview of how an XFEL would address the scientific requirements for MaRIE.

Paper

Title

Other Keywords

Page

MOP071

Terahertz Light Source and User Area at FACET

radiation, electron, photon, linac

238

Z. Wu, A.S. Fisher, M.J. Hogan, S.Z. Li, M.D. Litos
SLAC, Menlo Park, California, USA

Funding: Work supported by the U.S. Department of Energy under contract number DE-AC02-76SF00515.
FACET at SLAC provides high charge, high peak current, low emittance electron beam that is bunched at THz wavelength scale during its normal operation. A THz light source based coherent transition radiation (CTR) from this beam would potentially be the brightest short-pulse THz source ever constructed. Efforts have been put into building this photon source together with a user area, to provide a platform to utilize this unique THz radiation for novel nonlinear and ultrafast phenomena researches and experiments.

MOP095

Experimental Determination of Damage Threshold Characteristics of IR Compatible Optical Materials

laser, electron, photon, accelerating-gradient

277

K. Soong, E.R. Colby, C. McGuinness
SLAC, Menlo Park, California, USA
R.L. Byer, E.A. Peralta
Stanford University, Stanford, California, USA

Funding: Work funded by DOE contract DE‐AC02‐76SF00515 (SLAC)
The accelerating gradient in a laser-driven dielectric accelerating structure is often limited by the laser damage threshold of the structure. For a given laser-driven dielectric accelerator design, we can maximize the accelerating gradient by choosing the best combination of the accelerator’s constituent material and operating wavelength. We present here a model of the damage mechanism from ultrafast infrared pulses and compare that model with experimental measurements of the damage threshold of bulk silicon. Additionally, we present experimental measurements of a variety of candidate materials, thin films, and nanofabricated accelerating structures.

MOP282

A Deterministic, Gigabit Serial Timing, Synchronization and Data Link for the RHIC LLRF

LLRF, controls, diagnostics, target

642

T. Hayes, F. Severino, K.S. Smith
BNL, Upton, Long Island, New York, USA

Funding: Work supported by Brookhaven Science Associates, LLC under Contract No. DE-AC02-98CH10886 with the U.S. Department of Energy.
A critical capability of the new RHIC low level rf system is the ability to synchronize signals across multiple locations. The Update Link provides this functionality. The Update Link is a deterministic serial data link based on the Xilinx Aurora protocol that is broadcast over fiber optic cable at 1 gigabit per second. The link provides timing events and data packets as well as time stamp information for synchronizing diagnostic data from multiple sources.

MOP283

A Hardware Overview of the RHIC LLRF Platform

LLRF, controls, monitoring, status

645

T. Hayes, K.S. Smith
BNL, Upton, Long Island, New York, USA

Funding: Work supported by Brookhaven Science Associates, LLC under Contract No. DE-AC02-98CH10886 with the U.S. Department of Energy.
The RHIC LLRF platform is a flexible, modular system designed around a carrier board with six XMC daughter sites. The carrier board features a Xilinx FPGA with an embedded, hard core Power PC that is remotely reconfigurable. It serves as a front end computer (FEC) that interfaces with the RHIC control system. The carrier provides high speed serial data paths to each daughter site and between daughter sites as well as four generic external fiber optic links. It also distributes low noise clocks and serial data links to all daughter sites and monitors temperature, voltage and current. To date, two XMC cards have been designed: a four channel high speed ADC and a four channel high speed DAC.

TUP019

The S-DALINAC Polarized Injector SPIN - Performance and Results

electron, laser, polarization, linac

853

C. Eckardt, T. Bahlo, P. Bangert, R. Barday, U. Bonnes, M. Brunken, C. Burandt, R. Eichhorn, J. Enders, M. Espig, C. Ingenhaag, J. Lindemann, M. Platz, Y. Poltoratska, M. Roth, F. Schneider, H. Schüßler, M. Wagner, A. Weber, B. Zwicker
TU Darmstadt, Darmstadt, Germany
W. Ackermann, W.F.O. Müller, T. Weiland
TEMF, TU Darmstadt, Darmstadt, Germany
K. Aulenbacher
IKP, Mainz, Germany

Funding: * Work supported by DFG through SFB 634.
At the superconducting 130 MeV Darmstadt electron linac S-DALINAC the new source of polarized electrons uses a GaAs cathode illuminated with pulsed Ti:Sapphire and diode laser light. The electron source had been set up and commissioned at a test stand with a beam line where a Wien filter for spin manipulation, a Mott polarimeter for polarization measurement and a chopper-prebuncher system were part of the system. Upon completion of the tests, test stand and beam line were dismantled and re-installed at the S-DALINAC. The new photo injector opens up the potential for experiments with polarized electron and photon beams for nuclear structure studies at low momentum transfers. Various polarimeters will be installed at all experimental sites to monitor the beam polarization. We report on the S-DALINAC, the results from the teststand performance, the implementation of the polarized source and the polarimeter research and development.
* A. Richter, Proc. of the 5th EPAC, Sitges (1996) 110
** Y. Poltoratska et al., AIP Conference Proc. 1149 (2009) 983
*** P. Mohr et al., Nucl. Instr. and Meth. A423 (1999) 480

TUP274

Oak Ridge National Laboratory Spallation Neutron Source Electrical Systems Availability and Improvements

kicker, extraction, injection, pulsed-power

1337

R.I. Cutler, D.E. Anderson, W.E. Barnett, J.D. Hicks, J.J. Mize, J. Moss, K. Norris, V.V. Peplov, K.R. Rust, J. T. Weaver
ORNL, Oak Ridge, Tennessee, USA

Funding: SNS is managed by UT-Battelle, LLC, under contract DE-AC05-00OR22725 for the U.S. Department of Energy.
SNS electrical systems have been operational for 4 years. System availability statistics and improvements are presented for ac electrical systems, dc and pulsed power supplies and klystron modulators

THP163

Pre-Conceptual Design Requirements for an X-Ray Free Electron Laser for the MaRIE Experimental Facility at LANL

photon, electron, linac, FEL

2417

R.L. Sheffield, C.W. Barnes, M.A. Bourke, R.W. Garnett, M.S. Gulley, A.J. Taylor
LANL, Los Alamos, New Mexico, USA

Funding: Work performed under the auspices of the U.S. Department of Energy, under contract DE-AC52-06NA25396.
The MaRIE (Matter-Radiation Interactions in Extremes) experimental facility will be used to advance materials science by providing the tools scientists need to develop materials that will perform predictably and on demand for currently unattainable lifetimes in extreme environments. The MaRIE facilities, the Multi-Probe Diagnostic Hall (MPDH), the Fission and Fusion Materials Facility (F³), and the Making, Measuring, and Modeling Materials (M4) Facility will each have experimental needs for one or more high-energy X-ray beam probes. MPDH will also require access to an electron beam probe. These probe beams can be created using a 20-GeV electron linac, both to serve as a source of electrons and as a driver for a set of up to five X-ray undulators for the high-energy X-rays. Because of space considerations at the facility, a high-gradient design is being investigated that will use a normal-conducting linac and X-band RF systems. Experimental requirements are also calling for relatively long pulse lengths, as well as interleaving high- and low-charge electron bunches. This paper will provide an overview of how an XFEL would address the scientific requirements for MaRIE.