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TY - CONF AU - Klenov, V.S. AU - Bragin, S. AU - Volodkevich, O. AU - Zubets, V. ED - Kuzin, Maksim V. ED - Schaa, Volker RW TI - Low Energy "Pepper-Pot" Emittance Measuring Device J2 - Proc. of RUPAC2018, Protvino, Russia, 01-05 October 2018 C1 - Protvino, Russia T2 - Russian Particle Accelerator Conference T3 - 26 LA - english AB - The device which includes the "pepper-pot" mask, the quartz screen, and the CCD camera was used for measure the transverse emittances of beam at the exit of H-minus ion source for 7-15 keV beam energy. Emittance measuring at such low ions energy required low-level signals from quartz screen to be recorded and processed, while the intense glow of the gas discharge plasma created a spurious illumination of the quartz screen. The issues of obtaining sufficient signal level at such low ions energy, methods of subtracting the signal of non-ion-beam illumination of quartz screen from the full amplitude of the signal as well as issues of data processing and presentation of phase portraits are discussed. PB - JACoW Publishing CP - Geneva, Switzerland SP - 456 EP - 458 KW - emittance KW - extraction KW - plasma KW - H-minus KW - ion-source DA - 2018/11 PY - 2018 SN - 978-3-95450-197-7 DO - 10.18429/JACoW-RUPAC2018-THPSC23 UR - http://jacow.org/rupac2018/papers/thpsc23.pdf ER -