Author:
Charlet D.,Ishibashi T.,Martens A.,Masuzawa M.,Mawas F.,Peinaud Y.,Zhou D.,Zomer F.
Abstract
Abstract
The physics scope of the Belle II experiment currently
acquiring data at the SuperKEKB collider will expand with a
polarized electron beam upgrade, as recently proposed. Among the
required elements for this upgrade, a real time diagnosis of the
polarization is necessary to ensure it is large for all bunches in
the accelerator during its regular operation. This will be realized
by inserting a Compton polarimeter in the accelerator. Its
conceptual design is described and no show-stopper for its
integration has been identified. An estimation of the sensitivity of
the polarimeter is made by means of toy Monte-Carlo studies. The
proposed design accounts for the constraint to preserve the
performance of the SuperKEKB accelerator and to cope with the short
time separation of successive bunches. We show that the polarimeter
will measure for each bunch the polarization within five minutes
with a statistical precision below 1% and systematic
uncertainties below 0.5%. It has the capability of providing this
information online on a similar timescale. This work paves the way
towards future implementation of real-time Compton polarimetry in
several future projects.
Subject
Mathematical Physics,Instrumentation