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

Conference · Fri Sep 16 00:00:00 EDT 2016

OSTI ID:1329672

Shin, Young Min ^[1]; Green, A. ^[2]; Lumpkin, A. H. ^[3]; Thurman-Keup, R. M. ^[3]; Shiltsev, V. ^[3]; Zhang, X. ^[4]; Farinella, D. M. ^[5]; Taborek, P. ^[5]; Tajima, T. ^[5]; Wheeler, J. A. ^[6]; Mourou, G. ^[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

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 obtained 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).

• Research Organization: Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)
• Sponsoring Organization: USDOE Office of Science (SC), High Energy Physics (HEP)
• DOE Contract Number: AC02-07CH11359
• OSTI ID: 1329672
• Report Number(s): FERMILAB-CONF-16-381-APC; 1492678; TRN: US1601932
• Resource Relation: Conference: 17 Advanced Accelerator Concepts Workshop, National Harbor, MD (United States), 31 Jul - 5 Aug 2016
• Country of Publication: United States
• Language: English

Related Subjects

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