BL2-2

Overview

Beam line 2-2 is a bending magnet experimental station setup for general x-ray absorption spectroscopy in the 4.5 keV to 37 keV range. This beam line features a QEXAFS capable water cooled double-crystal monochromator. Si(111) or Si(220) crystal sets can be installed. White beam experiments are possible. On-the-fly scanning modes are available to shorten acquisition time and enable time resolved studies. In addition, this beam line is equipped with a comprehensive suite of hardware and software tools that support R&D in beam line automation.

Source —

1.3 Tesla bending magnet, 0.4 mrad acceptance

Status —

Operational

Beamline Parameters —

	Energy Range	Resolution ΔE/E	Spot Size	Flux
Unfocused	4500 to 37000 eV	1 x 10^-4	3.0 x 15.0 mm²	~10¹⁰ ph/sec

Optics —

Monochromator
Water cooled, fixed gap double crystal Si(111) or Si(220) Cam-shaft QEXAFS drive

Instrumentation —

Detectors	Ionization chambers Passivated implanted planar silicon (PIPS) diode
Ancillary	On-the-fly scanning capabilities: Continuous scanning typ. 90 s per 1 keV scan Quick scanning: max. 1 s per 1 keV scan
	Ionization chamber gas mixing and delivery system He, N2, Ar Max pressure 3 bar (44 psi)
	Automated high-throughput system Sample storage capacity >300 Focusing x-ray polycapillary

Sample Environment —

Standard	Ambient pressure, ambient temperature

Absorption —

673 microns Be, 12.4 meters He, 15.2 microns C

General Information

Erik Nelson

(650) 926-5103

enelson@slac.stanford.edu

Matthew Latimer

(650) 926-4944

latimer@slac.stanford.edu

(650) 926-5222

Contact the Duty Operator at (650) 926-4040

Submit a Proposal

Techniques

Publications

Highlights

Science Highlights

We are in the process of porting over science highlights from our previous system. You can access new highlights and a portion or our catalog here.

For science highlights dated before 2021 visit this site. Use the filters to narrow down your search by year and beam line.