A shutter design for time domain studies using synchrotron radiation at the Advanced Photon Source

Journal Article · Tue Dec 31 23:00:00 EST 1991 · Review of Scientific Instruments; (United States)

DOI:https://doi.org/10.1063/1.1143125· OSTI ID:5569335

Norris, J R; Bowman, M K; Chen, L; Tang, J; Thurnauer, M C ^[1]; Knapp, G S; Montano, P A ^[2]

---

1. Chemistry Division, Argonne National Laboratory, Argonne, Illinois 60439 (United States)
2. Materials Science Division, Argonne National Laboratory, Argonne, Illinois 60439 (United States)

In general, a variable repetition rate of the x-ray bunches is needed to explore time domain problems using x-rays. In some instances, the results of several hundreds or thousands of x-ray pulses must be averaged requiring the sample to be in the same time-dependent state each time the monitoring pulse strikes. The important point is that before a second x-ray pulse hits the sample, the system must return to its initial relaxed ground state prior to another spectrum pulse in order to prepare the same excited state again. Our key design principle employs a subsonic, rotating mirror whose period is slaved to the synchrotron intrapulse period. The synchrotron x-ray bunches will be reflected a distance of about 2 m to a narrow 0.5-mm slit just in front of the sample. A mirror rotating at a low 7500 rpm (125 Hz) is sufficient to select a single synchrotron pulse for the Advanced Photon Source. The very precise phase stability required by this method is currently available in rotating mirror devices for laser scanning.

• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 5569335
• Journal Information: Review of Scientific Instruments; (United States), Journal Name: Review of Scientific Instruments; (United States) Vol. 63:1; ISSN RSINA; ISSN 0034-6748
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
430303* -- Particle Accelerators-- Experimental Facilities & Equipment
440600 -- Optical Instrumentation-- (1990-)
47 OTHER INSTRUMENTATION
ANL
APERTURES
DESIGN
ELECTROMAGNETIC RADIATION
EQUIPMENT
IONIZING RADIATIONS
MIRRORS
NATIONAL ORGANIZATIONS
OPENINGS
OPERATION
PULSE TECHNIQUES
RADIATION SOURCES
RADIATIONS
SHUTTERS
SYNCHROTRON RADIATION SOURCES
US AEC
US DOE
US ERDA
US ORGANIZATIONS
X RADIATION
X-RAY EQUIPMENT