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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.
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.
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.
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