Performance of the elliptically polarizing undulator on SPEAR

Journal Article · Wed Feb 01 00:00:00 EST 1995 · Review of Scientific Instruments; (United States)

DOI:https://doi.org/10.1063/1.1145807· OSTI ID:6598667

Carr, R ^[1]; Kortright, J B; Rice, M ^[2]; Lidia, S ^[3]

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1. Stanford Synchrotron Radiation Laboratory, Stanford, California 94309 (United States)
2. Center for X-Ray Optics, Lawrence Berkeley Laboratory, Berkeley, California 94720 (United States)
3. Physics Department, University of California, Davis, California 95616 (United States)

This is a description of the first tests of the elliptically polarizing undulator (EPU) on the SPEAR storage ring at SSRL. The EPU is the first device of its type; it is capable of producing vertically and horizontally plane-polarized light, and right and left circularly polarized light in the 500--1000 eV range. Tests of the EPU were done to characterize its effect on the electron beam in SPEAR. Even at minimum gap, motion of the EPU magnets to vary the polarization of the output radiation caused negligible changes in the tune or the steering of the electron beam, even with no compensation of the steering trim coils. Also measured was the polarization of x rays generated by the EPU using a newly developed multilayer polarimeter built to be efficient in the EPU's energy range. The EPU produces nearly 100% plane and circularly polarized x rays. Using left and right circularly polarized radiation, tests of magnetic circular dichroism on magnetic multilayers were also performed.

• DOE Contract Number: AC03-76SF00098
• OSTI ID: 6598667
• Journal Information: Review of Scientific Instruments; (United States), Vol. 66:2; ISSN 0034-6748
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ONDULATOR RADIATION
POLARIZATION
SPEAR
EV RANGE 100-1000
LAYERS
MAGNETIC CIRCULAR DICHROISM
PERFORMANCE TESTING
WIGGLER MAGNETS
X RADIATION
BREMSSTRAHLUNG
DICHROISM
ELECTRICAL EQUIPMENT
ELECTROMAGNETIC RADIATION
ELECTROMAGNETS
ENERGY RANGE
EQUIPMENT
EV RANGE
IONIZING RADIATIONS
MAGNETS
RADIATIONS
STORAGE RINGS
TESTING
430303* - Particle Accelerators- Experimental Facilities & Equipment
665100 - Nuclear Techniques in Condensed Matter Physics - (1992-)