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
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.
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)