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DOI:10.18429/JACoW-IBIC2016-WEPG35
Title Design of an Electron Cloud Detector in a Quadrupole Magnet at CesrTA
Authors
  • J.P. Sikora, S.T. Barrettpresenter, M.G. Billing, J.A. Crittenden, K.A. Jones, Y. Li, T.I. O'Connell
    Cornell University (CLASSE), Cornell Laboratory for Accelerator-Based Sciences and Education, Ithaca, New York, USA
Abstract We have designed a detector that measures the electron cloud density in a quadrupole magnet using two independent techniques. Stripline electrodes collect electrons that would otherwise impact the beam-pipe surface. The striplines are placed behind an array of small holes in the beam-pipe wall in order to shield them from the beam-induced electromagnetic pulse. There are three striplines placed near one of the pole tips so that they cover a roughly 0.43 radian azimuth. The beam-pipe chamber has also been designed so that microwave measurements of the electron cloud density can be performed. Beam position monitor buttons have been included for excitation and reception of microwaves and the chamber has been designed so that the resonant microwaves are confined to be within the 56 cm length of the quadrupole field. This paper provides some details of the design including CST Microwave Studio time domain simulation of the stripline detectors and eigenmode simulation of the resonant chamber. The detector is installed in the Cornell Electron Storage Ring and is part of the test accelerator program for the study of electron cloud using electron and positron beams from 2 to 5 GeV.
Funding This work is supported by the US National Science Foundation PHY-0734867, PHY-1002467 and the US Department of Energy DE-FC02-08ER41538, DE-SC0006505.
Paper download WEPG35.PDF [0.602 MB / 4 pages]
Poster download WEPG35_POSTER.PDF [2.166 MB]
Conference IBIC2016, Barcelona, Spain
Series International Beam Instrumentation Conference (5th)
Proceedings Link to full IBIC2016 Proccedings
Session Wednesday Poster Session
Date 14-Sep-16   16:00–18:00
Main Classification Charge Monitors and Other Instruments
Keywords detector, electron, quadrupole, simulation, vacuum
Publisher JACoW, Geneva, Switzerland
Editors Isidre Costa (ALBA-CELLS, Barcelona, Spain); Ubaldo Iriso (ALBA-CELLS, Barcelona, Spain); Francis PĂ©rez (ALBA-CELLS, Barcelona, Spain); Volker RW Schaa (GSI, Darmstadt, Germany)
ISBN 978-3-95450-177-9
Published February 2017
Copyright
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cc Creative Commons Attribution 3.0