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TY - CONF AU - Ogiwara, N. AU - Fukuda, M. AU - Hatanaka, K. AU - Hikichi, Y. AU - Hori, Y. AU - Kamiya, J. AU - Kinsho, M. AU - Namekawa, Y. AU - Shima, T. AU - Takahisa, K. ED - Koscielniak, Shane ED - Satogata, Todd ED - Schaa, Volker RW ED - Thomson, Jana TI - A Non-destructive 2D Profile Monitor Using a Gas Sheet J2 - Proc. of IPAC2018, Vancouver, BC, Canada, April 29-May 4, 2018 C1 - Vancouver, BC, Canada T2 - International Particle Accelerator Conference T3 - 9 LA - english AB - We are developing a non-destructive and fast-response beam profile monitor using a dense gas sheet target. To make a gas sheet, we use the beaming effect, which is well known in vacuum science and technology. The emitted molecules through a long rectangular channel, which has a very small ratio of the gap to the width, are forced to concentrate on a plane. The gas sheet with a thickness of 1.5 mm and the density of 2×10⁻⁴ Pa was easily generated by the combination of the deep slit and the thin slit. Here, the gas sheet was produced by the deep slit, and the shape of the sheet was improved by the thin slit. The usefulness of this monitor was shown by the following experiments: 1) For the electron beam of 30 keV with a diameter greater than 0.35 mm, the position and the two-dimensional profiles were well measured using the gas sheet. 2) Then the profiles of the 10 and 400 MeV proton beam with a current of several microamperes were well measured, too. 3) Recently, the profiles of the 400 MeV H⁻ ion beams in J-PARC linac were measured. PB - JACoW Publishing CP - Geneva, Switzerland SP - 2190 EP - 2192 KW - experiment KW - electron KW - proton KW - linac KW - target DA - 2018/06 PY - 2018 SN - 978-3-95450-184-7 DO - 10.18429/JACoW-IPAC2018-WEPAL018 UR - http://jacow.org/ipac2018/papers/wepal018.pdf ER -