| Paper | Title | Page |
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| MOPAB137 | Validation of a Novel Emittance Diagnostic Method for Beams with Significant Space Charge | 451 |
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Funding: Work supported by the EU under grant agreement 624890, the STFC Cockcroft Institute Core Grant No. ST/G008248/1. Exact knowledge of beam emittance is of central importance for essentially every accelerator. However, there are only few methods to determine it when the beam has significant space charge. We report on our progress to validate a novel diagnostic method that has been proposed to determine the RMS emittance of an electron beam with space charge. This method uses RMS divergence and beam size data measured at a screen placed in a free drift region for selected values of magnetic focusing strength. A novel algorithm is then used to determine the cross correlation term and consequently the RMS emittance of the beam. Simulations, quadrupole scans, phase space tomography and optical diffraction-dielectric foil radiation interferometry are currently being employed to determine and compare the horizontal (x) and vertical (y) emittances of the 14 MeV witness electron beam at Argonne National Laboratory's Wakefield Accelerator. The results of simulations and current measurements are presented and the advantages of the new technique are discussed. |
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| DOI • | reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-MOPAB137 | |
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| MOPAB139 | A Supersonic Gas-Jet Based Beam Induced Fluorescence Prototype Monitor for Transverse Profile Determination | 458 |
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| Supersonic gas jets have been used in transverse beam profile monitoring as Ionization Profile Monitors (IPMs) and Beam Induced Fluorescence (BIF) monitors. The former method images ions generated by the projectile beam, whilst the latter is based on the detection of photons. This is a promising technology for use in high energy accelerators, such as the High Luminosity Large Hadron Collider (HLLHC). In this paper, the suitability of a supersonic gas jet in combination with a BIF detection system for the measurement of the transverse beam profile of a low energy electron beam is discussed. The technical layout and experimental results from measurements at a test installation at the Cockcroft Institute are also presented. | ||
| DOI • | reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-MOPAB139 | |
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| THPVA136 | Non-Invasive Online Beam Monitor Using LHCb VELO | 4780 |
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Funding: This project has received funding from the European Union's Horizon 2020 research and innovation programme under the Marie Sk'odowska-Curie grant agreement No 675265 Online beam monitoring is essential for ion beam therapy to assure effective delivery of the beam and maintain patient safety for cancer treatment. One candidate for such a monitoring device is the LHCb Vertex Locator (VELO) detector. It is a position sensitive silicon detector with an advantageous semi-circular design which enables approaching the core of the beam without interfering with it. In this contribution, tests using an infrared laser to calibrate the detector and obtain information about its dynamic range, spatial and time resolution will be discussed. Initial results from using the detector at the 60 MeV proton therapy beamline at the Clatterbridge Cancer Centre (CCC), UK are also presented. |
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| DOI • | reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-THPVA136 | |
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