SRC Users' Meeting - Synchrotron Radiation Center - University of ...

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STATUS OF THE SRC BEAMLINES AND INSTRUMENTATION M. Bissen SRC, Univ. of Wisconsin, 3731 Schneider Dr., Stoughton, WI-53589 The Instrumentation Group maintains the SRC and SRC/PRT monochromator beamlines on Aladdin for use by the scientific community. The technical details of these instruments and the PRT and CnTech beamlines is available on-line at www.src.wisc.edu. Thus, instead of repeating that information, this report will focus on current uses of the existing beamline and progress for the new beamlines currently under development. Also, the Group operates a variety of experimental endstations that are available to the User community. Initial operation of the Wadsworth beamline on the U2 undulator is planned for Fall 2003. The beamline will cover the range from 8 to 50 eV utilizing the high brightness undulator source for ARPES experiments. An additional beamline from U2, the VLS-PGM, is being constructed for PEEM experiments requiring high brightness. The proposed variable line spacing monochromator will cover the range from 60 to 2000 eV with a resolving power of nearly 1000. For this mode of operation, the U2 undulator will be operated as a wiggler at maximum k value (4.69). Commissioning is currently scheduled for summer 2004. An update on the NIM classic maintenance and a progress report on the PGM repairs will be presented as well as future plans for upgrades of some of the facility experimental chambers. In addition, results of the recent U1 NIM and Scienta SES 2002 will be shown. This Users’ Meeting is supported by the National Science Foundation, Grant No. DMR- 0084402.
SRC OPERATIONS Bob Legg SRC provides beam in scheduled 3-week experimental quantums. There is a scheduled one-week “Development Week” for maintenance after every two quantums. Each week of an experimental quantum is scheduled from 8 AM Monday until 8 AM Saturday; five days, 24 hours a day. Saturdays are used for holiday make-up and to provide users with additional beam time. Each day during the week has four injections, 8 AM, noon, 6 PM and midnight. The noon to 8 AM period is considered scheduled beam for users. SRC over the year ending 10/1/2003 provided the normal 4271 hours of scheduled beam with a 98% reliability. The hours of operation can be broken down into 3636 hours of 800 MeV beam and 634 hours of 1 GeV beam. Saturdays and morning beams accounted for an additional 887 hours of user beam. The major source of downtime for the year was intermittent equipment failure. Operations have continued to be dynamic. The group changed this year with the departure of swing shift operator, Dan Granger, and his replacement by Craig Trewartha. As a group we worked to complete several projects left from previous years (vacion readbacks, Diagnostic front ends, U3 Control interface, etc.). There was continued effort in the installation of the user utilities on the Wadsworth beamline. We also assigned a specific electronic technician to become a schematic draftsman, specifically responsible for AutoCAD support of the SRC electrical drawings. This was done to convert some of the original hand sketches of Aladdin systems to appropriate, dated, drawings. Operations are also working to improve operator training. With the advent of the automated “One Button” setups for Aladdin, many of the operators don’t get time doing machine setup and control during normal user operations. To maintain their ability to deal with the off normal situations, Operator training has been instituted during the development periods. By improving Operator capabilities and addressing weaknesses in the installed machine, operations will continue to make the machine more reliable in the year to come.
Page 2 and 3: Welcome to the 36 th SRC Users’ M
Page 4 and 5: 12:20 - 1:10 Lunch 1:10 -1:45 Poste
Page 6 and 7: Administration Executive Director D
Page 10 and 11: ACCELERATOR DEVELOPMENTS Ken Jacobs
Page 12 and 13: HIGH ENERGY RESEARCH POSSIBILITIES
Page 14 and 15: ATOMICALLY UNIFORM THIN FILMS ON SI
Page 16 and 17: calculated binding energies of the
Page 18 and 19: MANY-ELECTRON EFFECTS ON THE XE 5S
Page 20 and 21: PHOTOELECTRON SPECTROMETRY OF ATOMI
Page 22 and 23: PHOTOEMISSION STUDY OF USb AND UTe
Page 24 and 25: CANADIAN SYNCHROTRON RADIATION FACI
Page 26 and 27: SELF-ASSEMBLY OF BLOCK COPOLYMERS O
Page 28 and 29: A B S T R A C T S
Page 30 and 31: Photoemission spectra, a.u. -0.3 -0
Page 32 and 33: THE INITIAL AND FINAL STATE BANDS I
Page 34 and 35: TRANSITION LAYERS AT BURIED FERROMA
Page 36 and 37: LOW-DIMENSIONAL ELECTRONS AT SILICO
Page 38 and 39: SUBCELLULAR DISTRIBUTION OF MOTEXAF
Page 40 and 41: LINEAR POLARIZATION MEASUREMENTS OF
Page 42 and 43: Fig.1: Photoemission spectra of opt
Page 44 and 45: The sample manipulator has a cool d
Page 46 and 47: Cr and Fe but for these U systems t
Page 48 and 49: [4] G. -H. Gweon, J. W. Allen, and
Page 50 and 51: References [1] S. Cho, Y. Kim, A. D
Page 52 and 53: [3] D. L. Mills, Physical Review B
Page 54 and 55: CHARACTERIZATION OF SULPHATE INTERA
Page 56 and 57: in the data acquisition chamber. Th
Page 58 and 59:
spatially resolved chemistry of the
Page 60 and 61:
THE RELATIONSHIP BETWEEN PHOSPHATE
Page 62 and 63:
PHOTOEMISSION STUDIES OF QUANTUM WE
Page 64 and 65:
Ag surface state such that it moves
Page 66 and 67:
HIGH-RESOLUTION STUDY OF THE LITHIU
Page 68 and 69:
RELATIVE PARTIAL CROSS SECTIONS AND
Page 70 and 71:
Christian Ast Max-Planck Institute
Page 72 and 73:
David L. Huber Physical Sciences La
Page 74 and 75:
Tom Miller University of Illinois a
Page 76 and 77:
Eric Wiedemann University of Wiscon
Page 78 and 79:
Pete Hagen Phone: (608) 877-2154 Em
Page 80:
NOTES
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