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Date of Award
Physics and Astronomy
The Large Angle Beamstrahlung Monitor (LABM) is a device capable to monitor
the beam-beam collisions. The LABM measures the beamstrahlung light emitted
at large angle during the collisions of electron and positron beams. The properties
of the beamstrahlung, spectrum and polarization, are fundamentally related to the
size and relative position of the beams. Measuring the beamstrahlung, the LABM
delivers information about the size of the beams and their relative position at the
interaction point. The LABM will be part of the instrumentation of SuperKEKB,
a new e+e− collider that aims to reach the world record luminosity of 8×10^35 cm^-2 s^-1.
To achieve such luminosity, SuperKEKB will use the nano-beam scheme, which
allows for beams with a height of few tens of nanometers. In this framework, the
LABM represents an invaluable piece if instrumentation, allowing to measure the
size and relative position of the beams at run time and to adjust their position
in case of misalignment. The commissioning phase of the LABM took place in
parallel to the commissioning phase of SuperKEKB, starting in February 2016 and
ending in June 2016. During this phase no collisions took place and the LABM
was used to measure the background radiation produced by bending magnets. All
the components of the LABM where tested and the device has proved to work
as expected. A few upgrades will be installed at the end of 2017 to improve the
performance and the reliability of the device. The LABM will be ready and fully
operative at the beginning of 2018, when the first collisions will take place and
beamstrahlung light will be measured.
Di Carlo, Salvatore, "Commissioning Of The Large Angle Beamstrahlung Monitor At Superkekb" (2017). Wayne State University Dissertations. 1694.