A Low Energy Ion Beam Pepper Pot Emittance Device
نویسنده
چکیده
The transverse emittance of the ion beam at the Heidelberg Ion Therapy Center (HIT) will be measured within the Low Energy Beam Transport (LEBT) using a pepper-pot measurement system. At HIT, two ECR sources produce ions (H, He, C and O) at an energy of 8keV/u with different beam currents from about 80 μA to 2mA. The functionality and components of the pepper-pot device is reviewed as well as the final design and the choice of the scintillator. For that, results from recent beam test at the Max Planck Institute für Kernphysik at Heidelberg are presented. The material investigation was focused on inorganic doped crystal, inorganic undoped crystal, borosilicate glass and quartz glass with the following characteristics: availability, prior use in beam diagnostics, radiation hardness, transparency, fast response, spectral matching to CCD detectors.
منابع مشابه
MonPE20 Development of the Pepper-pot Emittance Meter for Diagnostics of Low-Energy Multi-Charged Heavy Ion Beams Extracted from an ECR Ion Source
To improve the beam transport in LEBT, it is important to understand the dynamics of ion beams extracted from an ECR ion source. Transverse emittances are crucial parameters for beam quality, and the beam intensity can be optimized by means of emittance matching with the LEBT’s acceptance. Moreover, the importance of decoupling any inter-plane correlation in the transverse 4D emittance is discu...
متن کاملCharacterization of laser-driven single and double electron bunches with a permanent magnet quadrupole triplet and pepper-pot mask
Electron beams from laser-plasma wakefield accelerators have low transverse emittance, comparable to those from conventional radio frequency accelerators, which highlights their potential for applications, many of which will require the use of quadrupole magnets for optimal electron beam transport. We report on characterizing electron bunches where double bunches are observed under certain cond...
متن کاملEmittance Measurements and Operation Optimization for Ecr Ion Sources
Electron Cyclotron Resonance (ECR) ion sources supply a broad range of ions for post acceleration in cyclotrons. Here, an effort to improve the beam transfer from RIKEN’s 18 GHz superconducting ECR ion source (SC ECRIS) to the Low Energy Beam Transfer (LEBT) line and an optimization of the performance of the ion source is presented. Simulation studies have shown that less than 20% of the beam i...
متن کاملMicrowave Ion Source for Low Charge State Ion Production
The Plasma and Ion Source Technology Group at LBNL have developed a microwave ion source. The source consists of a stainless-steel plasma chamber, a permanent-magnet dipole structure and a coaxial microwave feed. Measurements were carried out to characterize the plasma and the ion beam produced in the ion source. These measurements included current density, charge state distribution, gas effici...
متن کاملEmittance and Energy Spread Measurements of Relativistics Electrons from Laser-driven Accelerator
In this paper, we present a single-shot transverse emittance measurement for 125 ± 3 MeV electron beam using pepper-pot technique. A normalised transverse emittance as low as 1.1 ± 0.1 -mm-mrad was measured using this method. Considering 60 consecutive shots, an average normalised emittance of εrms,x,y=2.2 ± 0.7, 2.3 ± 0.6 -mm-mrad was obtained, which is comparable to a conventional linear ac...
متن کامل