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The Circular Electron Positron Collider (CEPC) is a large international scientific project initiated and hosted by China. It is located in a 100-km circumference underground tunnel. The accelerator complex consists of a linear accelerator…

Accelerator Physics · Physics 2018-11-09 The CEPC Study Group

We present a topology for linear accelerators (linacs) that permits larger degrees of freedom for the optimization of individual cavity shapes. The power is distributed to the cavities through a waveguide with periodic apertures that…

Accelerator Physics · Physics 2020-09-16 Sami Tantawi , Mamdouh Nasr , Zenghai Li , Cecile Limborg , Philipp Borchard

This report describes the exploration of fundamental questions in particle physics at the energy frontier with a future TeV-scale e+e- linear collider based on the Compact Linear Collider (CLIC) two-beam acceleration technology. A…

Instrumentation and Detectors · Physics 2012-09-13 P. Lebrun , L. Linssen , A. Lucaci-Timoce , D. Schulte , F. Simon , S. Stapnes , N. Toge , H. Weerts , J. Wells

Field emission is one of the key issues in superconducting RF. When present, it limits operating gradient directly or via induced heat load at 2K. In order to minimize particulate contamination of and thus field emission in the CEBAF SRF…

Accelerator Physics · Physics 2015-10-13 Jay Benesch

After a 14 month shutdown accelerator modifications and upgrades are in place to allow us doubling of the Main Injector beam power. We will discuss the past MI high power operation and the current progress towards doubling the power.

Accelerator Physics · Physics 2014-09-09 I. Kourbanis

Multiple Electrostatic Quadrupole Array Linear Accelerators (MEQALACs) provide an opportunity to realize compact radio-frequency (RF) accelerator structures that can deliver very high beam currents. MEQALACs have been previously realized…

Accelerator Physics · Physics 2017-11-02 A. Persaud , P. A. Seidl , Q. Ji , E. Feinberg , W. L. Waldron , T. Schenkel , S. Ardanuc , K. B. Vinayakumar , A. Lal

The upgrade of the ISOLDE machine at CERN foresees a superconducting linac based on two gap independently phased Nb sputtered Quarter Wave Resonators (QWRs) working at 101.28MHz and producing an accelerating field of 6MV/m on axis. A…

Accelerator Physics · Physics 2009-10-05 A. D'Elia , R. M. Jones , M. Pasini

A superconducting RF accelerator test facility is being constructed at Fermilab. The existing New Muon Lab (NML) building is being converted for this facility. The accelerator will consist of an electron gun, injector, beam acceleration…

Fermilab is currently constructing a superconducting electron linac that will eventually serve as the backbone of a user-driven facility for accelerator science. This contribution describes the accelerator and summarizes the enabled…

Accelerator Physics · Physics 2013-04-02 P. Piot , V. Shiltsev , S. Nagaitsev , M. Church , P. Garbincius , S. Henderson , J. Leibfritz

Use of a traveling wave (TW) accelerating structure with a small phase advance per cell instead of standing wave may provide a significant increase of accelerating gradient in a superconducting linear accelerator. The TW section achieves an…

Accelerator Physics · Physics 2015-02-10 Pavel Avrakhov , Roman Kostin , Alexei Kanareykin , Nikolay Solyak , Vyacheslav P. Yakovlev

The next generation of high-energy physics experiments requires high intensity protons in the multi-GeV energy range for efficient production of secondary beams. The Fermilab long-term future requires an 8 GeV proton source to feed the Main…

Accelerator Physics · Physics 2012-03-09 L. Jenner , C. Johnstone , D. Neuffer , J. Pasternak

The Fermilab Side-Coupled Linac accelerates H-beam from 116 MeV to 400 MeV through seven 805 MHz modules. Twelve wire scanners are present in the Side Coupled Linac and four are present in the transfer line between the Linac and the Booster…

Accelerator Physics · Physics 2024-09-05 E. Chen , R. Sharankova , A. Shemyakin , J. Stanton

This paper reports on the feasibility study of a proton Super-Conducting Linac (SCL) as a new injector to the Alternating Gradient Synchrotron (AGS) of the Brookhaven National Laboratory (BNL). The Linac beam energy is in the range of 1.5…

Accelerator Physics · Physics 2007-05-23 D. Raparia , A. G. Ruggiero

MESA (Mainz Energy recovery Superconducting Accelerator) is an energy recovery linac (ERL) which is under construction at Johannes Gutenberg University in Mainz. It will be operated in external beam (EB) mode with 150 $\mu$A electron beam…

Accelerator Physics · Physics 2021-02-02 S. Glukhov , O. Boine-Frankenheim , C. Stoll , F. Hug

Here, we introduce Linac_Gen, a tool developed at Fermilab, which combines machine learning algorithms with Particle-in-Cell methods to advance beam dynamics in linacs. Linac_Gen employs techniques such as Random Forest, Genetic Algorithms,…

Accelerator Physics · Physics 2024-06-25 Abhishek Pathak

Using an 800 nm, 45 fs pulse-front-tilted laser we demonstrate a record 315 keV energy gain in a dual grating dielectric laser accelerator (DLA) and average accelerating gradients of 560 MV/m over 0.5 mm. These results open a new regime in…

Accelerator Physics · Physics 2018-11-14 D. Cesar , J. Maxson , P. Musumeci , X. Shen , R. J. England , K. P. Wootton , S. Tan

We summarize the discussion on the possibilities of doing inclusive and semi-inclusive deep inelastic scattering experiments at CEBAF with beam energy of the order of 10 GeV.

Nuclear Theory · Physics 2009-09-25 B. Frois , P. J. Mulders

Suppression of beam losses is essential for successful operation of high-intensity linac. Historically, the values of the field amplitudes and phases of the side-coupled, 805-MHz LANSCE linac modules are maintained using a well-known…

Accelerator Physics · Physics 2020-02-26 Y. K. Batygin , F. E. Shelley , H. A. Watkins

CEA is committed to the design, construction and commissioning of a Medium Energy Beam Transfer line and a superconducting linac (SCL) for SARAF accelerator in order to accelerate 5mA beam of either protons from 1.3 MeV to 35 MeV or…

Accelerator Physics · Physics 2019-10-15 L. Zhao , G. Ferrand , F. Gougnaud , R. Duperrier , N. Pichoff , C. Marchand

Laser-plasma accelerators offer a compact means of producing high-energy electron beams, but their performance is fundamentally limited by dephasing between the accelerated electrons and the plasma wave. To overcome this limitation, we…