APS Beamline Commissioning Activity Approval Form

Sequence No : 33-BM-01-4
Sector : 33 Beamline : BM
Start Date : 30 May 2001 Duration : 6 months
Date and Time of Submission : 05-30-01 12:10
Commissioning Envelope :
The maximum operating current is 100 ma
Modes : white beam in 33 BM A, monobeam in 33 BM B
Activity Description:
The UNICAT mission is to provide advanced x-ray techniques to a diverse scientific community. Station 33-BM-B will provide resources for X-ray Absorption Spectroscopy (XAS) and Extended X-ray Absorption Fine Structure (EXAFS) to investigate and characterize catalyst performance and poisoning. This station will also provide for monochromatic x-ray topography techniques to characterize lattice defects and residual strain in single-crystal materials. The optical design of the beamline includes a vertically collimating x-ray mirror followed by a double crystal monochromator and a vertically focusing mirror. The double crystal monochromator will use symmetric, asymmetric, and sagittal focusing crystals. The mirrors will be Pd coated to provide harmonic rejection, and maintain excellent reflectivity below about 24 KeV. (For operations above 24 KeV, the mirrors will be removed). The combination of optical elements is designed to allow maximum flexibility while preserving beam brilliance, and simultaneously optimizing energy and momentum transfer resolution. Aborption spectroscopy and anomolous scattering techniques will greatly benefit from energy resolution below the lifetime broadened core hole width. Current plans for detectors include: film, two dimensional CCD camera(s), linear sensitive proportional counters, solid state Ge & Si(Li) detectors, gas-filled proportional counters, gas-filled ion chambers, scintillation detectors, and assorted analyzing crystals. Beamline control will be provided through a SUN UNIX platform, using the EPICS control system (channel access calls) and distributed VME crates. Diffractometer control and data acquisition software are undecided at this time. Under this commissioning activity, we will bring white light into 33BM-A, and monochromatic light into 33BM-B for commissioning of Beamline components including endstation equipment. Team members include Joe Greene Haydn Chen Howard Birnbaum Tai-Chang Chiang Antony Frenkel Hawoong Hong Jan Ilavsky Pete R. Jemian Jenia Karapetrova Ian Robinson Myron Salamon Ralph Simmons Paul Zschack Gabrielle G. Long Andrew J. Allen David R. Black Harold E. Burdette Dan Fischer Richard D. Spal John Budai Gene Ice Bennet C. Larson Cullie J. Sparks, Jr. Elliott Specht Jon Tischler Simon Bare Bob Broach George Mickelson Andreszj Ringwelski
Commissioning Team Members

First and Last Name AffiliationPhone Number
1. Paul Zscahck UNICAT 2-0860
Special Safety Concerns:
I have no special concerns regarding experimental activities in the 33BM-B hutch. UNICAT has provided an approved experimental safety approval process to manage experiment safety on the APS Experiment Hall floor.
Submitted by Commissioning Activity Team Leader:
Name : Paul Zschack Date : 05-30-01
E-Mail : zschack@anl.gov
ADD for Operations Comment :
None
Approved by ADD for Ops./Designee : Job on 06-01-01