Redesigned front end for the upgrade at CHESS

Journal Article · Sun Sep 01 04:00:00 EDT 1996 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.1147346· OSTI ID:389631

Headrick, R L; Smolenski, K W ^[1]

---

1. CHESS, Cornell University, Wilson Lab., Ithaca, NY 14853 (United States)

We will report on beamline front-end upgrades for the 24-pole wiggler beamlines at CHESS. A new design for primary x-ray beamstops based on a tapered, water-cooled copper block has been implemented and installed in the CHESS F beamline. The design uses a horizontally tapered {open_quote}{open_quote}V{close_quote}{close_quote} shape to reduce the power density on the internal surfaces and internal water channels in the block to provide efficient water cooling. Upstream of the beam stops, we have installed a new photoelectron style beam position monitor with separate monitoring of the wiggler and dipole vertical beam positions and with micron-level sensitivity. The monitor{close_quote}s internal surfaces are designed to absorb the full x-ray power in case of beam missteering, and the uncooled photoelectron collecting plates are not visible to the x-ray beam. A graphite prefilter has been installed to protect the beryllium windows that separate the front end from the x-ray optics downstream. The redesigned front end is required by the upgrade of the Cornell storage ring, now in progress, which will allow stored electron and positron currents of 300 mA by 1996, and 500 mA by 1998. At 500 mA, the wiggler power output will be over 32 kW. {copyright} {ital 1996 American Institute of Physics.}

• OSTI ID: 389631
• Report Number(s): CONF-9510119--
• Journal Information: Review of Scientific Instruments, Journal Name: Review of Scientific Instruments Journal Issue: 9 Vol. 67; ISSN 0034-6748; ISSN RSINAK
• Country of Publication: United States
• Language: English

Related Subjects

44 INSTRUMENTATION
INCLUDING NUCLEAR AND PARTICLE DETECTORS
BEAM TRANSPORT
DESIGN
ELECTRON BEAMS
FILTERS
MILLI AMP BEAM CURRENTS
MODIFICATIONS
PHOTON BEAMS
POSITRON BEAMS
STORAGE RINGS
SYNCHROTRON RADIATION SOURCES
WIGGLER MAGNETS
X RADIATION