Beamline X20C
General Information
Source Type Bending Magnet Status Operational General User Beamtime 25% Energy Range Category Hard X-Ray (1-50 keV) Energy Range 7-11 keV (Si(111));4-11 keV (multilayers)
Beamline Type Participating Research Team (PRT) Technique(s) X-ray diffraction, single crystal X-ray diffraction, surface X-ray diffraction, time resolved X-ray reflectivity X-ray scattering, surface
Institution(s) IBM Research Division
Research Types Optional high-bandpass synthetic multilayer monochromator which provides a high photon flux. Weakly diffracting systems and time-resolved diffraction of phase transformations are studied.
Contact Information
Spokesperson ![The person from each beamline who acts as a contact point between the beamline management and NSLS administration. Contact for questions about the beamline scientific program, experimental capabilities, and beamline management.](https://webarchive.library.unt.edu/eot2008/20080916100122im_/http://www.nsls.bnl.gov/images/icons/definition_sm.gif)
Jean Jordan-Sweet, IBM Research Division, JLJ@BNL.GOV, 631-344-8581
Local Contact ![The beamline staff member who is typically responsible for overseeing the daily operation and maintenance of the beamline. Contact for questions about beamline instrumentation, experimental details, and training.](https://webarchive.library.unt.edu/eot2008/20080916100122im_/http://www.nsls.bnl.gov/images/icons/definition_sm.gif)
Jean Jordan-Sweet, IBM Research Division, JLJ@BNL.GOV, 631-344-8581
Beamtime Scheduler ![The beamline staff member responsible for coordination of beamline schedule every trimester. Contact for questions about beamtime scheduling.](https://webarchive.library.unt.edu/eot2008/20080916100122im_/http://www.nsls.bnl.gov/images/icons/definition_sm.gif)
Jean Jordan-Sweet, IBM Research Division, JLJ@BNL.GOV, 631-344-8581
Beamline Phone
631-344-5720
Instrumentation
Beamline Characteristics
Energy Range |
Mono Crystal or Grating |
Resolution (ΔE/E) |
Flux |
Spot Size (mm) |
Total Angular Acceptance (mrad) |
7 – 11 keV |
Si(111) |
3.6 x 10-3 (meas. Ni edge width) |
5 x 1011 (@ 8 keV, 300 mA, 2.8 GeV, FWHM) |
0.8H x 0.7V |
4 |
4 – 10.5 keV |
23 d-spacing W-Si multilayers |
0.011 |
2 x 1013 (@ 8 keV, 300 mA, 2.8 GeV, FWHM) |
0.8H x 1.0V |
4 |
Source Type Bending magnet Optical System Mirror: Platinum coated silicon, adjustably bent cylinder mirror with 1:1 focusing; mirror length is 600 mm; radius is 8 cm; theta = 7.4 mradians (0.42 degree); mirror located 10.8 meters from the source.
Monochromator: Scanning double-crystal fixed-exit-beam monochromator; first crystal is water cooled; PZT servo with optional closed-loop feedback on second crystal; Bragg angle ranges from 4 degrees to 54 degrees 2theta; located 14 meters from the source. Experimental Apparatus Radiation hutch with 11'6" ceiling and overhead hoist; Six circle Huber diffractometer (vertical diffraction plane); Ion chambers, scintillation detectors, and avalanche photodiode detector; Computer controlled table for Huber. Computer System Hardware & Software IBM Intellistation; RedHat Linux operating system; CAMAC and GPIB interfaces; "C-Plot" on-line graphics and "SPEC" software for six circle operation; data can be downloaded onto DOS formatted diskette, 4mm tape, or CD. Data can also be sftp’d to home institution or anonymous ftp’d to ftp.nsls-user.bnl.gov/X20C.
Links
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