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What is ESTB?

End Station (A) Test Beam (ESTB) uses 5 Hz of the LCLS beam and is used for detector R&D, beamline instrumentation tests, irradiation studies and accelerator experiments. It can provide a varied range of beam energies (2 to 16 GeV) and beam intensities that range from very clean single electrons or up to a billion electrons per bunch ....
End Station Test Beam (ESTB) uses a small fraction of the available 13.6 GeV electron beam from the Linac Coherent Light Source (LCLS) to provide test beam capabilities in End Station A (ESA).
ESTB is a unique resource in all of High Energy Physics for studies requiring high energy, high intensity, low emittance electron beams in a large experimental area. These studies include accelerator instrumentation, linear collider accelerator and machine/detector interface (MDI) R&D, development of radiation-hard detectors, material damage studies, and astroparticle detector research.
A small portion (typically 5 Hz) of the LCLS beam is diverted into the A-line. This beam can be transported all the way to ESA for beam instrumentation and accelerator physics studies at full electron beam intensity. Alternatively, it can be directed against a thin screen in the A-line to produce secondary electrons or positrons with energies up to the incident energy, and a wide range of intensities including single particles/pulse suitable for detector studies.
The time structure of the test beams is that of the SLAC linac and is unique in delivering picosecond pulses at known times. This makes triggering and data collection very convenient at ESTB.
ESTB utilizes the existing ESA, a large experimental hall 60 meters in length with 15 and 50-ton overhead cranes and excellent availability of utilities, cable plant, and components for mounting experiments. ESA is ideal for detector development and testing large scale prototypes or complete systems with high energy particles.
Test beams have been an integral part of SLAC’s research program for 40 years. ESTB continues SLAC’s successful test beam program and provides invaluable hands-on experimental opportunities for graduate students, postdocs, the university user community and SLAC staff, and revitalizes the SLAC HEP community’s efforts in developing new instrumentation and detector technologies for future experiments.




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