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Beamline X21

General Information

Source Type
Insertion Device

Status
Operational

General User Beamtime
50%

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

Energy Range
6-16 keV

Beamline Type
Facility Beamline

Technique(s)
X-ray diffraction, single crystal
X-ray diffraction, surface
X-ray diffraction, wide angle
X-ray scattering, magnetic
X-ray scattering, resonant
X-ray scattering, surface
X-ray scattering, wide angle

Institution(s)
Boston University
University of Vermont

Research Types
X-ray Scattering in a Magnetic Field, In-situ Materials Processing, X-ray Scattering

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.
Christie Nelson, Brookhaven National Laboratory, csnelson@bnl.gov, 344-4916

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.
Christie Nelson, Brookhaven National Laboratory, csnelson@bnl.gov, 344-4916

Beamtime Scheduler The beamline staff member responsible for coordination of beamline schedule every trimester. Contact for questions about beamtime scheduling.
Christie Nelson, Brookhaven National Laboratory, csnelson@bnl.gov, 344-4916

Beamline Phone
631-344-5721

Instrumentation

Beamline Characteristics

Energy Range Mono Crystal or Grating Resolution (ΔE/E) Flux Spot Size (mm) Total Angular Acceptance (mrad)
6 – 16 keV interchangeable Si(111) and multilayer ~2 x 10-4 for Si(111); ~10-2 for multilayer ~2 x 1012 ph/sec @ 300mA ~1 x 1 mm^2 1

Source Type
Hybrid wiggler, 13 periods, 12 cm period

Optical System
This beamline has two experimental hutches. The upstream hutch is intended for scattering experiments that utilize the 13 T superconducting magnet. The downstream hutch is intended for in-situ film growth experiments, and experiments that utilize a 4-circle Huber diffractometer.

Experimental Apparatus
Upstream hutch: 13 T superconducting magnet, with vertical field, mounted on a spectrometer table in a horizontal scattering geometry

Downstream hutch: 4-circle Huber diffractometer; displex cryostat; spectrometer table for in-situ film growth

Computer System Hardware & Software
EPICS-based control system, SPEC

Links