TY - CONF AU - Dooling, J.C. AU - Borland, M. AU - Cook, N.M. AU - Grannan, A.M. AU - Graziani, C.J. AU - Lee, D.W. AU - Lee, Y. AU - Lindberg, R.R. AU - Navrotski, G. ED - Biedron, Sandra ED - Simakov, Evgenya ED - Milton, Stephen ED - Anisimov, Petr M. ED - Schaa, Volker R.W. TI - Hydrodynamic and Beam Dynamic Simulations of Ultra-Low Emittance Whole Beam Dumps in the Advanced Photon Source Storage Ring J2 - Proc. of NAPAC2022, Albuquerque, NM, USA, 07-12 August 2022 CY - Albuquerque, NM, USA T2 - International Particle Accelerator Conference T3 - 5 LA - english AB - The Advanced Photon Source Upgrade will use a multi-bend achromatic lattice to reduce vertical and horizontal beam emittances by one- and two-orders of magnitude respectively; in addition operating current will double. The resulting electron beam will be capable of depositing more than 150 MGy on machine protection collimators creating high-energy-density conditions. Work is underway to couple the beam dynamics code Elegant with the particle-matter interaction program MARS and the magnetohydrodynamics code FLASH to model the effects of whole beam dumps on the collimators. Loss distributions from Elegant are input to MARS which provide dose maps to FLASH. We also examine the propagation of downstream shower components after the beam interacts with the collimator. Electrons and positrons are tracked to determine locations of beam loss. Beam dump experiments conducted in the APS storage-ring, generated dose levels as high as 30 MGy resulting in severe damage to the collimator surfaces with melting in the bulk. The deformed collimator surface may lead to beam deposition in unexpected locations. A fan-out kicker is planned to mitigate the effects of whole beam dumps on the collimators. PB - JACoW Publishing CP - Geneva, Switzerland SP - 390 EP - 393 KW - electron KW - simulation KW - experiment KW - photon KW - storage-ring DA - 2022/10 PY - 2022 SN - 2673-7000 SN - 978-3-95450-232-5 DO - doi:10.18429/JACoW-NAPAC2022-TUPA21 UR - https://jacow.org/napac2022/papers/tupa21.pdf ER - TY - CONF AU - Burger, N. AU - Andonian, G. AU - Cook, N.M. AU - Denham, P.E. AU - Diaw, A. AU - Gavryushkin, D.I. AU - Hodgetts, T.J. AU - Lamure, A.-L.M.S. AU - Musumeci, P. AU - Norvell, N.P. AU - Ody, A. AU - Ruelas, M. AU - Welsch, C.P. AU - Yadav, M. ED - Biedron, Sandra ED - Simakov, Evgenya ED - Milton, Stephen ED - Anisimov, Petr M. ED - Schaa, Volker R.W. TI - Experimental Characterization of Gas Sheet Transverse Profile Diagnostic J2 - Proc. of NAPAC2022, Albuquerque, NM, USA, 07-12 August 2022 CY - Albuquerque, NM, USA T2 - International Particle Accelerator Conference T3 - 5 LA - english AB - Transverse profile diagnostics for high-intensity beams require solutions that are non-intercepting and single-shot. In this paper, we describe a gas-sheet ionization diagnostic that employs a precision-shaped, neutral gas jet. As the high-intensity beam passes through the gas sheet, neutral particles are ionized. The ionization products are transported and imaged on a detector. A neural-network based reconstruction algorithm, trained on simulation data, then outputs the initial transverse conditions of the beam prior to ionization. The diagnostic is also adaptable to image the photons from recombination. Preliminary tests at low energy are presented to characterize the working principle of the instrument, including comparisons to existing diagnostics. The results are parametrized as a function of beam charge, spot size, and bunch length. PB - JACoW Publishing CP - Geneva, Switzerland SP - 907 EP - 909 KW - diagnostics KW - electron KW - laser KW - operation KW - MMI DA - 2022/10 PY - 2022 SN - 2673-7000 SN - 978-3-95450-232-5 DO - doi:10.18429/JACoW-NAPAC2022-THZE4 UR - https://jacow.org/napac2022/papers/thze4.pdf ER -