Find people (by last name)


Advanced search

Beamline X20A

General Information

Source Type
Bending Magnet

Status
Operational

General User Beamtime
25%

Energy Range Category
Hard X-Ray (1-50 keV)

Energy Range
4.5-13 keV

Beamline Type
Participating Research Team (PRT)

Technique(s)
X-ray diffraction, single crystal
X-ray diffraction, wide angle
Microdiffraction Imaging
X-ray reflectivity
X-ray scattering, surface

Institution(s)
IBM Research Division

Research Types
Devoted to x-ray scattering, diffraction, and microdiffraction of thin films, polymers, liquid crystals, and microelectronics materials.

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)
4.5 – 13 keV Ge(111) 0.6-2.0 x 10-3 (meas. 4-bounce Si220 @ 10 keV) 8.0 x 1010 ph/sec (meas. @ 8 keV, 300 mA, 2.8 GeV) 0.7H x 0.7V 4
5.5 – 12 keV Ge(111) 2.4 x 10-3 (meas. Ni edge width) 1 x 108 ph/sec (meas. @ 8 keV, 300 mA, 2.8 GeV) 0.005H x 0.005V (5mr divergence) 0.5 mm at capillary entrance

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 = 6.25 mradians (0.36 degrees); mirror located 12.8 meters from the source.

Monochromator: Scanning double-crystal fixed-exit-beam monochromator; first crystal is water cooled; PZT servo with closed-loop feedback on second crystal; Bragg angle ranges from 8 degrees to 36.6 degrees 2theta; located 16 meters from the source.

Experimental Apparatus
Radiation hutch with 11'6" ceiling and overhead hoist; Four circle Huber diffractometer (vertical diffraction plane); Tapered capillary microdiffraction endstation (upon approval); Ion chambers, scintillation detectors, and avalanche photodiode detector; Computer controlled table for Huber.

Computer System Hardware & Software
IBM Intellistation; RedHat Enterprise Linux 4 operating system; VME and GPIB interfaces; "C-Plot" on-line graphics and "SPEC" software for four circle operation; data can be downloaded onto DOS or Linix formatted diskette, USB drive, or CD. Data can also be sftp’d to home institution or anonymous ftp’d to ftp.nsls-user.bnl.gov/X20A.

Links