Reflectivity Measurements for Copper and Aluminumin the Far Infrared and the Resistive Wall Impedance in the LCLSUndulator

Conference · Tue Jun 27 00:00:00 EDT 2006

OSTI ID:885277

Bane, K L.F.; Stupakov, G; Tu, J J

Reflectivity measurements in the far infrared, performed on aluminum and copper samples, are presented and analyzed. Over a frequency range of interest for the LCLS bunch, the data is fit to the free-electron model, and to one including the anomalous skin effect. The models fit well, yielding parameters dc conductivity and relaxation times that are within 30-40% of expected values. We show that the induced energy in the LCLS undulator region is relatively insensitive to variations on this order, and thus we can have confidence that the wake effect will be close to what is expected.

• Research Organization: SLAC National Accelerator Lab., Menlo Park, CA (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC02-76SF00515
• OSTI ID: 885277
• Report Number(s): SLAC-PUB-11924; TRN: US0603839
• Resource Relation: Conference: Presented at European Particle Accelerator Conference (EPAC 06), Edinburgh, Scotland, 26-30 Jun 2006
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
ACCELERATORS
ALUMINIUM
COPPER
FREQUENCY RANGE
IMPEDANCE
REFLECTIVITY
RELAXATION TIME
SKIN EFFECT
WIGGLER MAGNETS
Accelerators
ACCPHY