scholarly journals Electron beam deceleration measurements using the decelerator test beam line in the Compact Linear Collider test facility

2014 ◽  
Vol 17 (3) ◽  
Author(s):  
R. L. Lillestøl ◽  
S. Döbert ◽  
E. Adli ◽  
M. Olvegård
Keyword(s):  
Electron Beam ◽  
Linear Collider ◽  
Beam Line ◽  
Test Facility ◽  
Test Beam

scholarly journals Beam Purity for Light Dark Matter Search in Beam Dump Experiments

2015 ◽  
Vol 2015 ◽  
pp. 1-6 ◽  
Author(s):  
D. Banerjee ◽  
P. Crivelli ◽  
A. Rubbia
Keyword(s):  
Dark Matter ◽  
Electron Beam ◽  
Beam Line ◽  
Test Beam ◽  
Dark Matter Search ◽  
Beam Dump ◽  
Background Rejection ◽  
Unexplored Area ◽  
Simulation Results

This paper reviews the search for light dark matter in beam dump experiments with a special emphasis on the necessity of beam purity for precise background rejection at the sensitivities aimed at these experiments. As a case study we cite the P348 experiment which has test beam time in Fall 2015 at the SPS H4 beam line at CERN and aims to search for theU′(1)gauge boson,A′, which as per one model of dark matter mediates a weak interaction between ordinary matter and dark matter via mixing of these “dark photons” with ordinary photon. The experiment aims to probe the still unexplored area of mixing strength10-5≤ϵ≤10-3and massesMA′≤100 MeV by using 10–300 GeV electron beam from the CERN SPS. This paper presents the simulation results for rejection of background due to beam impurity, by tracking the incoming particles with Micromegas detectors at a level <10-10.

scholarly journals POLARIZED POSITRONS AT A FUTURE LINEAR COLLIDER AND THE FINAL FOCUS TEST BEAM

2005 ◽  
Vol 20 (31) ◽  
pp. 7423-7432 ◽  
Author(s):  
◽  
ACHIM W. WEIDEMANN
Keyword(s):  
Electron Beam ◽  
Linear Collider ◽  
Test Beam ◽  
Polarized Electrons ◽  
Radiation Length ◽  
Test Electron ◽  
Demonstration Experiment ◽  
Desirable Feature ◽  
Polarized Photons ◽  
Future Linear Collider

Polarized positrons in addition to polarized electrons are a highly desirable feature of future linear e+e-colliders. The motivation for polarized positrons, and a demonstration experiment for the undulator-based production of polarized positrons are reviewed. This experiment ('E-166') uses the 50 GeV Final Focus Test electron beam at SLAC with a 1 m-long helical undulator to make ≈ 10MeV polarized photons. These photons are then converted in a thin (≈ 0.5 radiation length) target into positrons (and electrons) with about 50% polarization.

Instrument for Studying Wake Fields Influence to International Linear Collider High Intensity Bunch

2009 ◽  
Vol 4 (1) ◽  
pp. 30-36
Author(s):  
Petr Bak ◽  
Dmitriy Bolkhovityanov ◽  
Andrey Korepanov ◽  
Pavel Logatchev ◽  
Dmitriy Malyutin ◽  
...  
Keyword(s):  
Electron Beam ◽  
Measurement Error ◽  
High Intensity ◽  
Linear Collider ◽  
International Linear Collider ◽  
Basic Principles ◽  
Beam Interaction ◽  
Simulation Results ◽  
Main Components ◽  
Wake Fields

Instrument for bunch tilt measurements in linear collider is presented. Electron beam probe basic principles are described and method of bunch tilt measurements is discussed. The simulation results of testing beam interaction with tilted relativistic bunch are presented. Main components of the bunch tilt measurement error are determined.

scholarly journals Commissioning of beam instrumentation at the CERN AWAKE facility after integration of the electron beam line

2018 ◽  
Vol 1067 ◽  
pp. 072015
Author(s):  
Ishkhan Gorgisyan ◽  
Stefano Mazzoni ◽  
Stephane Burger ◽  
Lars Jensen ◽  
Steen Jensen ◽  
...  
Keyword(s):  
Electron Beam ◽  
Beam Line

scholarly journals Channeling and radiation experiments at SLAC

2019 ◽  
Vol 34 (34) ◽  
pp. 1943006
Author(s):  
U. Wienands ◽  
S. Gessner ◽  
M. J. Hogan ◽  
T. Markiewicz ◽  
T. Smith ◽  
...  
Keyword(s):  
Gamma Rays ◽  
Beam Energy ◽  
Narrow Band ◽  
Test Facility ◽  
Test Beam ◽  
High Beam ◽  
Silicon Crystals ◽  
Volume Reflection ◽  
Series Of Experiments ◽  
First Time

Since 2014, a SLAC-Aarhus-Ferrara-CalPoly collaboration augmented by members of ANL and MIT has performed electron and positron channeling experiments using bent silicon crystals at the SLAC End Station A Test Beam as well as the FACET accelerator test facility. These experiments have revealed a remarkable channeling efficiency of about 24% under our conditions. Volume reflection is even more efficient with almost the whole beam taking part in the reflection process. A positron experiment demonstrated quasi-channeling oscillations for the first time at high beam energy. In our most recent experiment we measured the spectrum of gamma radiation for crystal orientations covering channeling and volume reflection. This series of experiments supports the development of more advanced crystalline devices capable e.g. of producing narrow-band gamma rays with electron beams or studying the interaction of the electrons with the wakefields generated in the crystal at high beam intensity.

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