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Advanced Photon Source
Sector 7

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Sector 7: Overview and History

Sector 7 consists of two APS beamlines:
  • 7-ID: an insertion device beamline based on an APS Type-A Undulator
  • 7-BM: a bend magnet beam line for time-resolved radiography (currently being commissioned)

Overview of 7-ID

7-ID comprises four large experimental enclosures designated A, B, C, and D. In 2004, a laser enclosure was also added (7ID-E).

Enclosure 7-ID-A is the first optics enclosure and houses a polished Be window, an empty x-ray filter unit, a pair of white beam slits, a water-cooled double crystal diamond monochromator (Kohzu HLD4), and a P4 mode shutter. The beamline vertical offset is 35 mm.

Enclosure 7-ID-B is a white-, or monochromatic-beam experimental enclosure. It is equipped with two precision motorized table for alignment and positioning of experimental equipment. This station is used for white-beam imaging or microdiffraction experiments.

Just downstream of 7-ID-B is a mini-enclosure housing the P5 unit. This acts as a white beam stop and offset mono-beam shutter to pass monochromatic beam into downstream enclosures C and D. Continuing downstream, a mono-beam transport takes monochromatic beam into enclosures C and D. Enclosure C houses a large Huber 6-circle Diffractometer and two optical tables to set up users' experiments. A streak camera is also available for ultrafast time-resolved detection (ps resolution). A fs-laser housed in 7ID-E is delivered in 7ID-C to the diffractometer and streak camera for time-resolved experiments. Synchronization is achieved in pump-probe geometry utilitizing the RF bunch clock signal brought from the APS control room on an optical fiber. A commercial diode-pumped Ti-Sapphire femtosecond pulsed laser is used in both 7ID-C and 7ID-D.

Contiguous to C, enclosure D is instrumented with a microprobe station for Atomic Physics and Chemistry experiments. A small optical table is also available for users' experiments.

Status of 7-ID

All three enclosures 7-ID-B, C, and D are operational and accepting General Users since 2002.

Overview of 7-BM

7-BM comprises two contiguous enclosures, 7-BM-A and B. 7-BM-A is the first optics enclosure which houses a white beam slit, a double-crystal multilayer monochromator (1.5% bandpass, 5.5-11 keV energy range), a P6 shutter, and a flat harmonic rejection mirror. 7BM-B is an experimental station intended for time-resolved radiography. 7-BM-B houses two precision motorized tables for alignment and positioning of experimental equipment. A 300 mm long Kirkpatrick-Baez mirror system can focus the beam below 10 microns on the second experimental table in 7BM-B. 7BM-B is also equipped with a chemical exhaust system.

Status of 7-BM

The 7BM beamline has been dedicated to time-resolved radiography, primarily for transportation research. The beamline is under commissioning and is expected to be available for APS General Users in FY12.

History

Sector 7 was built and commissioned by MHATT-CAT, the University of Michigan, Howard University,
and ATT Bell Laboratories Collaborative Access Team. Operational support by the DoE BES was transitioned
from MHATT-CAT to the APS between 2002 and 2004.

In addition to the three initial institutions, there are several groups including scientists at Oak Ridge National Laboratory
and Hebrew University which contributed significantly to the success of Sector 7. Below are some useful links
to the Sector 7 partners.

Key MHATT-CAT and APS/Sector 7 Design and Safety documents (APS Network Access only)

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