Difference between revisions of "CMS"

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====Normal Beam====
 
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For 13.5 keV, 250 mA ring current, beam divergence 0.1 mrad H × 0.1 mrad V
  
 
====Small Beam====
 
====Small Beam====

Revision as of 14:21, 27 January 2017

Logo CMS 20.png

The Complex Materials Scattering (CMS) beamline at NSLS-II is a synchrotron instrument focused on x-ray scattering. It is located at 11-BM (bending magnet port) on the NSLS-II floor, and features a three-pole wiggler source. It can perform SAXS and WAXS experiments, focusing on high-throughput and 'intelligent' machine-guided exploration of parameter spaces.

CMS beamline01.jpg

Capabilities

CHX can perform a variety of experiments:

Performance

Energy

  • Can perform experiments from 10 keV to 17 keV.
  • Energy resolution (double multilayers): 10−3

q-range

  • 0.003 Å−1 to 4.2 Å−1 (209 nm to 0.15 nm)

Resolution

Ultimate resolution (detector pixel limited) is 0.0002 Å−1.

beam size (mm) beam divergence (mrad) pixel size (mm) pixel FW @ 5 m (mrad) pixel FW @ 5 m, 13.5 keV (Å−1) resolution, FWHM (Å−1)
0.200 0.10 0.172 0.03 0.00024 0.0007
0.100 0.05 0.172 0.03 0.00024 0.0002

Flux

Full Beam

At start of endstation (bim3 ionchamber):

  • 1.6 ×1012 ph/s/0.1%bw (1.5 × 0.1 mrad; diagnostic mesh in-place; 13.5 keV, 250 mA ring current)

Near sample position, full beam (no slits):

  • 1.3 ×1012 ph/s/0.1%bw (13.5 keV, 250 mA ring current)

Normal Beam

For 13.5 keV, 250 mA ring current, beam divergence 0.1 mrad H × 0.1 mrad V

Small Beam

For 13.5 keV, 250 mA ring current:

S4 slits size (mm) beam divergence (mrad) beam V size at sample position (μm) beam flux at sample/detector (ph/s) olog
0.100 H × 0.010 V 0.10 H × 0.10 V 33 2×109 819_1
0.100 H × 0.010 V 0.10 H × 0.05 V 22 1×109 821_1
  • With divergence of 0.1 mrad H x 0.05 mrad V and S4 beam size of 0.1 mm H x 0.01 mm V, "knife-edge" smy scan implies beam FWHM of ~ 22 um V at sample and flux of 1e+9 cts/s as measured at Pilatus (with attenuation factor included).

With divergence of 0.1 mrad H x 0.1 mrad V and S4 beam size of 0.1 mm H x 0.01 mm V, "knife-edge" smy scan implies beam FWHM of ~ 33 um V at sample and flux of 2e+9 cts/s as measured at

Beam Size

  • Typical 50-100 µm
  • Beam can be shaped (using slits) to 10 µm.

Access

CMS has taken 'first light' and is currently completing technical commissioning. General User access is scheduled for summer 2017. Access will be possible through the NSLS-II proposal system, and through the CFN proposal system. Interested users should contact beamline staff.

Contact

  • Beamline phone number: 631-344-1911

Beamline Staff

Masa Fukuto (beamline lead)
  • email: fukuto@bnl.gov
  • office phone: 631-344-5256
  • office location: Bldg. 744 (green LOB of NSLS-II), room 4L108
Masa Fukuto01.jpeg
Ruipeng Li (beamline staff)
  • email: rli@bnl.gov
  • office phone: 631-344-????
  • office location: Bldg. 744 (green LOB of NSLS-II), room 4L140
Ruipeng Li01.jpg
Kevin Yager (partner user beamline staff)
  • email: kyager@bnl.gov
  • office phone: 631-344-7608
  • office location: Bldg. 735 (CFN), room 2018 (2nd floor, east side)
Kevin Yager01.jpg

Training

Software

See Also