• Corpus ID: 238407911

Crystal slow extraction of positrons from DAFNE: the SHERPA project

  title={Crystal slow extraction of positrons from DAFNE: the SHERPA project},
  author={Marco Garattini and D. Annucci and Oscar Blanco-Garc{\'i}a and Paola Gianotti and Susanna Guiducci and A. Liedl and M. Raggi and P. Valente},
The SHERPA project aim is to develop an efficient technique to extract a positron beam from one of the accelerator rings composing the DAΦNE complex at the Frascati National Laboratory of INFN, setting up a new beam line able to deliver positron spills of O(ms) length, excellent beam energy spread and emittance. The most common approach to slowly extract from a ring is to increase betatron oscillations approaching a tune resonance in order to gradually eject particles from the circulating beam… 
Upper limit on efficiency of electron deflection in bent crystals
Basing on experiments at SLAC, MAMI, CERN, and on Monte Carlo simulations, we assess the physical limits on efficiency and reachable angles of electron deflection in bent crystals in the energy range
First design of a crystal-based extraction of 6 GeV electrons for the DESY II Booster Synchrotron
A proof-of-principle experimental setup for the extraction of 6 GeV electrons from the DESY II Booster Synchrotron using the channeling effect in bent crystals is elaborated. Various aspects of the


Elsevier : Possibility of high efficient beam extraction from the CERN SPS with a bent crystal. Simulation results
Abstract The extraction of the SPS beam of 270 GeV/c protons assisted by a bent crystal was studied by simulation. Two methods for delivering the SPS beam onto a crystal were considered: transverse
Preparation Activity for the Siddharta-2 Run at DAΦNE
DANE, the Frascati lepton collider working at the c.m. energy of the  resonance, continues to be a prominent infrastructure to realise experiments aimed at studying elementary particles and nuclear
Experimental results of crystal-assisted slow extraction at the SPS
The possibility of extracting highly energetic particles from the Super Proton Synchrotron (SPS) by means of silicon bent crystals has been explored since the 1990's. The channelling effect of a bent
First results of experiments on high-efficiency single-crystal extraction of protons from the U-70 accelerator
A radical increase in the efficiency of beam extraction from an accelerator is achieved with a short (7 mm long) crystal bent by a small angle (1.7 mrad) by increasing the number of times particles
High efficiency multi-pass proton beam extraction with a bent crystal at the SPS
Recent measurements of 120 GeV proton extraction by means of a bent silicon crystal at the CERN-SPS accelerator are summarized. The existence of multi-pass extraction has been proven by blocking
Steering of a sub-GeV electron beam through planar channeling enhanced by rechanneling.
We report the observation of efficient steering of a 855 MeV electron beam at MAMI (MAinzer MIkrotron) facilities by means of planar channeling and volume reflection in a bent silicon crystal. A 30.5
Deflection of MeV protons by an unbent half-wavelength silicon crystal.
On the strength of such coherent interactions, charged particle beams can be efficiently steered through an ultrathin unbent crystal by the same physical processes as for thicker bent crystals.
Particle accelerator physics
This book by Helmut Wiedemann is a well-established, classic text, providing an in-depth and comprehensive introduction to the field of high-energy particle acceleration and beam dynamics. The
Crystal Channeling and Its Application at High-Energy Accelerators
1. Channeling Phenomenon.- 2. Beam Deflection by Bent Crystals.- 3. Experimental Studies of High-Energy Channeling and Bending Phenomena in Crystals.- 4. Crystal Extraction.- 5. The Use of Crystal
Possibility of high efficient beam extraction from the CERN SPS with a bent crystal
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
  • 2017