LINAC2014 - Table of Session: THIOB (Invited Orals Technology)

Paper

Title

Page

Cryogenic Plants for SRF Linacs

811

D. Arenius
JLab, Newport News, Virginia, USA

Review of the types of considerations that go into cryo-plant design. Arenius is a world expert on this topic and has led the completion of the upgraded cryo-plant at Jefferson Lab, and has recently provided substantial input on this question to the new LCLS II project.

Slides THIOB01 [4.382 MB]

THIOB02

SPIRAL2 Cryomodule Production Result and Analysis

814

P.-E. Bernaudin, R. Ferdinand
GANIL, Caen, France
P. Bosland, C. Marchand
CEA/IRFU, Gif-sur-Yvette, France
Y. Gómez Martínez
LPSC, Grenoble Cedex, France
D. Longuevergne, G. Olry
IPN, Orsay, France

The production and qualification of the SPIRAL2 cryomodules are close to the end. Their performances are now well established. This paper will explain the path followed to the good achievements, and show some statistical analyses to be used for future projects. How far can we push the performances? What cryogenics consumption shall we take as design values?

Slides THIOB02 [2.864 MB]

THIOB03

Results From the LCLS X-Band Transverse Deflector With Femtosecond Temporal Resolution

819

Y. Ding, F.-J. Decker, V.A. Dolgashev, J.C. Frisch, Z. Huang, P. Krejcik, H. Loos, A. Lutmann, A. Marinelli, T.J. Maxwell, D.F. Ratner, J.L. Turner, J.W. Wang, M.-H. Wang, J.J. Welch, J. Wu
SLAC, Menlo Park, California, USA
C. Behrens
DESY, Hamburg, Germany

An X-band RF transverse deflector composed of two 1-m-long X-band deflecting structures has been recently commissioned at the Linac Coherent Light Source (LCLS) at SLAC National Accelerator Laboratory. Located downstream of the FEL undulator, this device provides electron beam longitudinal phase space diagnostics in both time and energy which enables reconstruction of the X-ray FEL power profiles with an unprecedented resolution. This talk reports on the progress of this new LCLS X-band transverse deflector, first usage experience and measured results.

Slides THIOB03 [3.508 MB]

THIOB04

Observation of >GV/m Decelerating Fields in Dielectric Lined Waveguides

TUPP140

use link to access more material from this paper's primary paper code

SUPG026

use link to access more material from this paper's primary paper code

B.D. O'Shea, G. Andonian, K.L. Fitzmorris, S. Hakimi, J. Harrison, J.B. Rosenzweig, O. Williams
UCLA, Los Angeles, California, USA
M.J. Hogan, V. Yakimenko
SLAC, Menlo Park, California, USA

Recent experimental measurements of the energy lost to wakefields in a dielectric lined waveguide are presented. These measurements demonstrate average decelerating gradients on the order of >1 GV/m, for two different structures. The measurements were made at the Facility for Advanced aCcelerator Experimental Tests (FACET) at SLAC National Laboratory using sub-millimeter diameter fifteen-centimeter long quartz fibers of annular cross section. The unique extremely short, high charge, ultra relativistic beam at FACET (200 fs, 3 nC, 20 GeV) allows the use of dielectric wakefield structures of unprecedented size and length. In addition to experimental results, we support conclusions with simulation and theoretical work. This measurement builds on a large body of work previously performed using dielectric wakefield structures in an effort to provide high gradient accelerating structures for tomorrows linear colliders.

Paper	Title	Page
THIOB01	Cryogenic Plants for SRF Linacs	811
	D. Arenius JLab, Newport News, Virginia, USA
	Review of the types of considerations that go into cryo-plant design. Arenius is a world expert on this topic and has led the completion of the upgraded cryo-plant at Jefferson Lab, and has recently provided substantial input on this question to the new LCLS II project.
	Slides THIOB01 [4.382 MB]

THIOB02	SPIRAL2 Cryomodule Production Result and Analysis	814
	P.-E. Bernaudin, R. Ferdinand GANIL, Caen, France P. Bosland, C. Marchand CEA/IRFU, Gif-sur-Yvette, France Y. Gómez Martínez LPSC, Grenoble Cedex, France D. Longuevergne, G. Olry IPN, Orsay, France
	The production and qualification of the SPIRAL2 cryomodules are close to the end. Their performances are now well established. This paper will explain the path followed to the good achievements, and show some statistical analyses to be used for future projects. How far can we push the performances? What cryogenics consumption shall we take as design values?
	Slides THIOB02 [2.864 MB]

THIOB03	Results From the LCLS X-Band Transverse Deflector With Femtosecond Temporal Resolution	819
	Y. Ding, F.-J. Decker, V.A. Dolgashev, J.C. Frisch, Z. Huang, P. Krejcik, H. Loos, A. Lutmann, A. Marinelli, T.J. Maxwell, D.F. Ratner, J.L. Turner, J.W. Wang, M.-H. Wang, J.J. Welch, J. Wu SLAC, Menlo Park, California, USA C. Behrens DESY, Hamburg, Germany
	An X-band RF transverse deflector composed of two 1-m-long X-band deflecting structures has been recently commissioned at the Linac Coherent Light Source (LCLS) at SLAC National Accelerator Laboratory. Located downstream of the FEL undulator, this device provides electron beam longitudinal phase space diagnostics in both time and energy which enables reconstruction of the X-ray FEL power profiles with an unprecedented resolution. This talk reports on the progress of this new LCLS X-band transverse deflector, first usage experience and measured results.
	Slides THIOB03 [3.508 MB]

THIOB04	Observation of >GV/m Decelerating Fields in Dielectric Lined Waveguides
TUPP140	use link to access more material from this paper's primary paper code
SUPG026	use link to access more material from this paper's primary paper code
	B.D. O'Shea, G. Andonian, K.L. Fitzmorris, S. Hakimi, J. Harrison, J.B. Rosenzweig, O. Williams UCLA, Los Angeles, California, USA M.J. Hogan, V. Yakimenko SLAC, Menlo Park, California, USA
	Recent experimental measurements of the energy lost to wakefields in a dielectric lined waveguide are presented. These measurements demonstrate average decelerating gradients on the order of >1 GV/m, for two different structures. The measurements were made at the Facility for Advanced aCcelerator Experimental Tests (FACET) at SLAC National Laboratory using sub-millimeter diameter fifteen-centimeter long quartz fibers of annular cross section. The unique extremely short, high charge, ultra relativistic beam at FACET (200 fs, 3 nC, 20 GeV) allows the use of dielectric wakefield structures of unprecedented size and length. In addition to experimental results, we support conclusions with simulation and theoretical work. This measurement builds on a large body of work previously performed using dielectric wakefield structures in an effort to provide high gradient accelerating structures for tomorrows linear colliders.