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@inproceedings{peng:ipac2021-mopab404,
author = {S.X. Peng and J.E. Chen and B.J. Cui and Z.Y. Guo and Y.X. Jiang and K. Li and T.H. Ma and Y.H. Pu and J. Sun and W.B. Wu and A.L. Zhang and J.F. Zhang},
% author = {S.X. Peng and J.E. Chen and B.J. Cui and Z.Y. Guo and Y.X. Jiang and K. Li and others},
% author = {S.X. Peng and others},
title = {{A Low Emittance Compact Proton Injector for a Proton Therapy Facility}},
booktitle = {Proc. IPAC'21},
pages = {1218--1221},
eid = {MOPAB404},
language = {english},
keywords = {proton, ion-source, emittance, LEBT, rfq},
venue = {Campinas, SP, Brazil},
series = {International Particle Accelerator Conference},
number = {12},
publisher = {JACoW Publishing, Geneva, Switzerland},
month = {08},
year = {2021},
issn = {2673-5490},
isbn = {978-3-95450-214-1},
doi = {10.18429/JACoW-IPAC2021-MOPAB404},
url = {https://jacow.org/ipac2021/papers/mopab404.pdf},
note = {https://doi.org/10.18429/JACoW-IPAC2021-MOPAB404},
abstract = {{To meet the requirements of a Proton Therapy Facility funded by the National Key Research and Development Program of China, a new compact ion source-LEBT integrated proton injector was developed at Peking University (PKU). It consists of a typical PKU permanent magnet compact 2.45 GHz ECR ion source (PMECRIS) and an electrostatic LEBT with an electrostatic lens, a beam chopper, a set of beam steers, an ACCT, a bellow, an e-trap, and a valve. A 1000 L/s molecular pump is adopted to maintain the vacuum for this integrated injector. The length from RF matching plane to RFQ front flange is about 450 mm. Chopper is used to shorten the pulse length from ms to µs with sharp edges. Test results of this PMECR source prove that it has the ability to deliver a proton beam with a current from 10 mA to 90 mA with a duty factor of 3%(100Hz/0.3ms) and its RMS emittance less than 0.1 mm·mrad at 30 keV. The acceptance tests of this integrated injector have been performed with a 30 keV hydrogen beam. A required proton current of 18 mA with ripple wave less than 0.1 mA successfully passed through a 20 mm aperture diaphragm at RFQ entrance flange. Its rms emittance is about 0.06 mm·mrad.}},
}