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Compressing electron pulses is important in many applications of electron beam systems. In this study, we propose to use optical beat notes to compress electron pulses. The beat frequency is chosen to match the initial electron pulse…

Accelerator Physics · Physics 2021-11-23 Zhexin Zhao , Kenneth J. Leedle , Dylan S. Black , Olav Solgaard , Robert L. Byer , Shanhui Fan

A proposal to search for direct {\mu}-->e conversion at Fermilab requires slow, resonant extraction of an intense proton beam. Large space charge forces will present challenges, partly due to the substantial betatron tune spread. The main…

Accelerator Physics · Physics 2012-09-27 V. Nagaslaev , J. Amundson , J. Johnstone , C. S. Park , S. Werkema

FLASH is a new treatment modality that requires optimization of dose, dose rate, and LET. Here we validate these three quantities under FLASH conditions, which includes the quantum uncertainty in the time-dependent instantaneous dose rate…

A new design for heavy-ion beam driven isentropic compression experiments is suggested and analysed. The proposed setup utilises long stopping ranges and the variable focal spot geometry of the high-energy uranium beams delivered at the GSI…

Plasma Physics · Physics 2009-02-05 A. Grinenko , D. O. Gericke , D. Varentsov

The University of Maryland Electron Ring (UMER) has operated traditionally in the regime of strong space-charge dominated beam transport, but small-current beams are desirable to significantly reduce the direct (incoherent) space-charge…

Accelerator Physics · Physics 2018-10-11 S. Bernal , B. Beaudoin , L. Dovlatyan , S. Ehrenstein , I. Haber , R. A. Kishek , E. Montgomery , D. Sutter

To achieve high focal spot intensities in heavy ion fusion, the ion beam must be compressed longitudinally by factors of ten to one hundred before it is focused onto the target. The longitudinal compression is achieved by imposing an…

Accelerator Physics · Physics 2009-11-10 Edward A. Startsev , Ronald C. Davidson

The upcoming Proton Improvement Plan-II (PIP-II), designated for enhancements to the Fermilab accelerator complex, features a new 800 MeV superconducting linac and a Beam Transfer Line (BTL) to transport the beam to the existing Booster…

Accelerator Physics · Physics 2024-06-03 A. Pathak , O. Napoly , J. -F. Ostiguy

For Project X, it is planned to inject a beam of 3x10**11 particles per bunch into the Main Injector. Therefore, at 8-GeV, there will be increased space charge tune shifts and an increased incoherent tune spread. In preparation for these…

Accelerator Physics · Physics 2013-01-30 D. J. Scott , D. Capista , I. Kourbanis , K. Seiya , M. -J. Yang

The Proton Improvement Plan, Stage Two (PIP-II) is a program of upgrades proposed for the Fermilab injection complex, which central part is an 800 MeV, 2 mA CW SRF linac. A prototype of the PIP-II linac front end called PIP-II Injector Test…

Accelerator Physics · Physics 2018-08-28 A. Shemyakin , J. -P. Carneiro , B. Hanna , V. Lebedev , L. Prost , A. Saini , V. Scarpine , V. L. S. Sista , C. Richard

One of the goals of the PXIE program at Fermilab is to demonstrate the capability to form an arbitrary bunch pattern from an initially CW 162.5 MHz H^{-} bunch train coming out of an RFQ. The bunch-by-bunch selection will take place in the…

Accelerator Physics · Physics 2015-01-30 Curtis Baffes , Alexander Shemyakin

Fermilab Booster synchrotron requires an intensity upgrade from 4.5x1012 to 6.5x1012 protons per pulse as a part of Fermilabs Proton Improvement Plan-II (PIP-II). One of the factors which may limit the high-intensity performance is the fast…

Accelerator Physics · Physics 2022-08-10 S. A. K. Wijethunga , J. Eldred , C. Y. Tan , E. Pozdeyev

The Muon g-2 Experiment plans to use the Fermilab Recycler Ring for forming the proton bunches that hit its production target. The proposed scheme uses one RF system, 80 kV of 2.5 MHz RF. In order to avoid bunch rotations in a mismatched…

Accelerator Physics · Physics 2017-09-25 D. Stratakis , M. Convery , J. P. Morgan , D. Still , M. J. Syphers , V. Tishchenko

One of the goals of the PXIE program at Fermilab is to demonstrate the capability to form an arbitrary bunch pattern from an initially CW 162.5 MHz H- bunch train coming out of an RFQ. The bunch-by-bunch selection will take place in the 2.1…

Accelerator Physics · Physics 2015-02-14 A. Shemyakin , C. Baffes

Low-rank model compression is a widely used technique for reducing the computational load when training machine learning models. However, existing methods often rely on relaxing the low-rank constraint of the model weights using a…

Signal Processing · Electrical Eng. & Systems 2023-07-05 Ye Xue , Vincent Lau

We present an overview of the performance of the Neutralized Drift Compression Experiment-II (NDCX-II) accelerator at Berkeley Lab, and report on recent target experiments on beam driven melting and transmission ion energy loss measurements…

Laser-driven (LD) ion acceleration has been explored in a newly constructed short focal length beamline at the BELLA petawatt facility (interaction point 2, iP2). For applications utilizing such LD ion beams, a beam transport system is…

We present a design of a stripline kicker for Integrable Optics Test Accelerator (IOTA). For its experimental program IOTA needs two full-aperture kickers, capable to create an arbitrary controllable kick in 2D. For that reason their…

Accelerator Physics · Physics 2016-07-04 Sergey A. Antipov , Alexander Didenko , Valeri Lebedev , Alexander Valishev

Integrable optics is an innovation in particle accelerator design that enables strong nonlinear focusing without generating parametric resonances. We use the Synergia tracking code to investigate the application of integrable optics to…

Accelerator Physics · Physics 2018-05-08 J. Eldred , A. Valishev

The Neutralized Drift Compression Experiment-II (NDCX-II) is an induction linac that generates intense pulses of 1.2 MeV helium ions for heating matter to extreme conditions. Here, we present recent results on optimizing beam transport. The…

Coulomb interaction between charged particles is a well-known phenomenon in many areas of researches. In general the Coulomb repulsion force broadens the pulse width of an electron bunch and limits the temporal resolution of many scientific…

Accelerator Physics · Physics 2018-03-16 Chao Lu , Tao Jiang , Shengguang Liu , Rui Wang , Lingrong Zhao , Pengfei Zhu , Dao Xiang , Jie Zhang