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Tevatron Beam Halo Collimation System: Design, Operational Experience and New Methods
Accelerator Subsystems and Technologies bent crystal collimation hollow electron beam collimation Accelerator Physics
2012/5/17
Collimation of proton and antiproton beams in the Tevatron collider is required to protect CDF and D0 detectors and minimize their background rates, to keep irradiation of superconducting magnets unde...
Shielding Experiments Under JASMIN Collaboration at Fermilab(III) - Measurement of High-Energy Neutrons Penetrating a Thick Iron Shield from the Antiproton Production Target by AU Activation Method
JASMIN Collaboration High-Energy Neutrons Thick Iron AU Activation Method
2012/5/17
In an antiproton production (Pbar) target station of the Fermi National Accelerator Laboratory (FNAL), the secondary particles produced by bombarding a target with 120-GeV protons are shielded by a th...
Calculation of Residual Dose Around Small Objects Using Mu2e Target as an Example
Accelerator Physics Residual Dose Mu2e Target
2012/5/17
The MARS15 code provides contact residual dose rates for relatively large accelerator and experimental components for predefined irradiation and cooling times. The dose rate at particular distances fr...
Muon Collider: Plans, Progress and Challenges
Muon Collider Plans Progress and Challenges Accelerator Physics
2012/4/27
We in the physics community expect the LHC to uncover new physics in the next few years. The character and energy scale of the new physics remain unclear, but it is likely that data from the LHC will ...
Extension of the Measurement Capabilities of the Quadrupole Resonator
Superconducting cavities niobium Quadrupole Resonator surface resistance critical RF field
2012/4/19
The Quadrupole Resonator, designed to measure the surface resistance of superconducting samples at 400 MHz has been refurbished. The accuracy of its RF-DC compensation measurement technique is tested ...
Computationally efficient methods for modelling laser wakefield acceleration in the blowout regime
Computationally efficient methods modelling laser wakefield acceleration blowout regime Accelerator Physics
2012/4/19
Electron self-injection and acceleration until dephasing in the blowout regime is studied for a set of initial conditions typical of recent experiments with 100 terawatt-class lasers. Two different ap...
Compendium of eigenmodes in third harmonic cavities for FLASH and the XFEL
Compendium of eigenmodes third harmonic cavities FLASH the XFEL
2012/4/19
The resonant modes in the 9cell 3.9GHz bunch shaping cavity designed by FERMILAB in collaboration with DESY [1] and installed in FLASH at DESY were calculated up to the range of 10GHz in terms of the ...
Heat Load and Stress Studies for an Design of the Photon Collimator for the ILC Positron Source
ILC collimator material stress high power beam absorption heat loads
2012/2/28
The ILC baseline design for the positron source is based on radiation from a helical undulator to produce positrons in a thin target. Since the photon beam created in the helical undulator is circular...
News from CERN, LHC Status and Strategy for Linear Colliders
CERN LHC Status Strategy Linear Colliders
2012/2/28
This paper presents the latest development at CERN, concentrating on the status of the LHC and the strategy for future linear colliders. The immediate plans include the exploitation of the LHC at its ...
A hybrid positron source, consisting of a crystal as electron to photon converter and a amorphous target, is a candidate to relax heat load problem for high intensity positron sources. In this article...
Polarization control proposal for Shanghai deep ultraviolet free electron laser
FEL Crossed undulator Circular polarization Slippage
2012/2/28
In this paper, a fully coherent radiation option with controllable polarization is proposed for Shanghai deep ultraviolet free electron laser (FEL) test facility. Intensive start-to-end simulation sug...
Simulations for CLIC Drive Beam Linac
Simulations CLIC Drive Beam Linac Compact Linear Collider
2012/2/28
The Drive Beam Linac of the Compact Linear Collider (CLIC) has to accelerate an electron beam with 4.2 A up to 2.4 GeV in almost fully-loaded structures. The pulse contains about 70000 bunches, one in...
High Bandwidth Pickup Design for Bunch Arrival-time Monitors for Free-Electron Laser
High Bandwidth Pickup Design Bunch Arrival-time Monitors Free-Electron Laser
2012/2/29
In this paper, we present the design and realization of high bandwidth pickup electrodes with a cutoff frequency above 40 GHz. The proposed cone-shaped pickups are part of a bunch arrival-time monitor...
High Bandwidth Pickup Design for Bunch Arrival-time Monitors for Free-Electron Laser
High Bandwidth Pickup Design Bunch Arrival-time Monitors Free-Electron Laser
2012/2/28
In this paper, we present the design and realization of high bandwidth pickup electrodes with a cutoff frequency above 40 GHz. The proposed cone-shaped pickups are part of a bunch arrival-time monitor...
Status of CLIC MBQ and DBQ Prototypes Procurement
Status CLIC MBQ DBQ Prototypes Procurement
2012/2/28
This paper gives the status of studies, design and prototype procurement for the magnets needed for the CLIC R&D and for the LAB and CLEX Test Programs.