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Title: Ultra-High Gradient Channeling Acceleration in Nanostructures: Design/Progress of Proof-of-Concept (POC) Experiments

A short bunch of relativistic particles or a short-pulse laser perturbs the density state of conduction electrons in a solid crystal and excites wakefields along atomic lattices in a crystal. Under a coupling condition the wakes, if excited, can accelerate channeling particles with TeV/m acceleration gradients in principle since the density of charge carriers (conduction electrons) in solids n0 = ~ 1020 – 1023 cm-3 is significantly higher than what can be obtained in gaseous plasma. Nanostructures have some advantages over crystals for channeling applications of high power beams. The dechanneling rate can be reduced and the beam acceptance increased by the large size of the channels. For beam-driven acceleration, a bunch length with a sufficient charge density would need to be in the range of the plasma wavelength to properly excite plasma wakefields, and channeled particle acceleration with the wakefields must occur before the ions in the lattices move beyond the restoring threshold. In the case of the excitation by short laser pulses, the dephasing length is appreciably increased with the larger channel, which enables channeled particles to gain sufficient amounts of energy. This paper describes simulation analyses on beam- and laser (X-ray)-driven accelerations in effective nanotube models obtainedmore » from Vsim and EPOCH codes. Experimental setups to detect wakefields are also outlined with accelerator facilities at Fermilab and NIU. In the FAST facility, the electron beamline was successfully commissioned at 50 MeV and it is being upgraded toward higher energies for electron accelerator R&D. The 50 MeV injector beamline of the facility is used for X-ray crystal-channeling radiation with a diamond target. It has been proposed to utilize the same diamond crystal for a channeling acceleration POC test. Another POC experiment is also designed for the NIU accelerator lab with time-resolved electron diffraction. Recently, a stable generation of single-cycle laser pulses with tens of Petawatt power based on thin film compression (TFC) technique has been investigated for target normal sheath acceleration (TNSA) and radiation pressure acceleration (RPA). The experimental plan with a nanometer foil is discussed with an available test facility such as Extreme Light Infrastructure – Nuclear Physics (ELI-NP).« less
Authors:
 [1] ;  [2] ;  [3] ;  [3] ;  [3] ;  [4] ;  [5] ;  [5] ;  [5] ;  [6] ;  [6]
  1. Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States); Northern Illinois Univ., DeKalb, IL (United States). Northern Illinois Center for Accelerator & Detector Development
  2. Northern Illinois Univ., DeKalb, IL (United States). Northern Illinois Center for Accelerator & Detector Development
  3. Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
  4. Shanhai Inst. of Optics and Fine Mechanics, Shanghai (China)
  5. Univ. of California, Irvine, CA (United States)
  6. Univ. of Michigan, Ann Arbor, MI (United States). Center for Ultrafast Optical Science and FOCUS Center ; Ecole Polytechnique, CNRS, Palaiseau (France). Lab. d' Optique Appliquee
Publication Date:
OSTI Identifier:
1329672
Report Number(s):
FERMILAB-CONF--16-381-APC
1492678; TRN: US1601932
DOE Contract Number:
AC02-07CH11359
Resource Type:
Conference
Resource Relation:
Conference: 17 Advanced Accelerator Concepts Workshop, National Harbor, MD (United States), 31 Jul - 5 Aug 2016
Research Org:
Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)
Sponsoring Org:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
Country of Publication:
United States
Language:
English
Subject:
77 NANOSCIENCE AND NANOTECHNOLOGY; 43 PARTICLE ACCELERATORS; EXPERIMENT DESIGN; NANOTUBES; ELECTRONS; CHANNELING; DIAMONDS; ACCELERATION; X RADIATION; ELECTRON DIFFRACTION; MEV RANGE 10-100; BEAMS; FERMILAB; LASER RADIATION; DENSITY; PULSES; RELATIVISTIC RANGE; TEV RANGE; ACCELERATOR FACILITIES; BEAM ACCEPTANCE; CHARGE CARRIERS; CHARGE DENSITY; COUPLING; FOILS; COMPUTERIZED SIMULATION; WAKEFIELD ACCELERATORS; FEASIBILITY STUDIES; PETAWATT POWER RANGE