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@inproceedings{liu:ibic2021-weoa03, author = {Y. Liu and A.V. Aleksandrov and C.D. Long}, title = {{Real-Time Longitudinal Profile Measurement of Operational H⁻ Beam at the SNS Linac Using a Laser Comb}}, booktitle = {Proc. IBIC'21}, pages = {328--331}, eid = {WEOA03}, language = {english}, keywords = {laser, electron, linac, neutron, photon}, venue = {Pohang, Rep. of Korea}, series = {International Beam Instrumentation Conference}, number = {10}, publisher = {JACoW Publishing, Geneva, Switzerland}, month = {10}, year = {2021}, issn = {2673-5350}, isbn = {978-3-95450-230-1}, doi = {10.18429/JACoW-IBIC2021-WEOA03}, url = {https://jacow.org/ibic2021/papers/weoa03.pdf}, note = {https://doi.org/10.18429/JACoW-IBIC2021-WEOA03}, abstract = {{We demonstrate a novel technique to measure the longitudinal profile of an operational hydrogen ion (H⁻) beam in a non intrusive, real-time fashion. The measurement is conducted based on the photo-ionization of the ion beam with a phase modulated laser comb pico-second laser pulses with controllable temporal structure. The measurement technique has been applied to a 1-GeV, 1.4-MW H⁻ beam at the Spallation Neutron Source (SNS) high energy beam transport (HEBT). A stroboscopic photo-graph of H⁻ beamμbunch can be obtained by using a phase modulated laser comb. The entire measurement takes only 700 us.}}, }