Paper | Title | Page |
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TUPS070 | An Experiment at HiRadMat: Irradiation of High-Z Materials | 1698 |
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Calculations of the impact of dense high intensity proton beams at SPS and LHC into material have been presented in several papers*,**,***. This paper presents the plans for an experiment to validate the theoretical results with experimental data. The experiment will be performed at the High Radiation to Materials (HiRadMat) facility at the CERN-SPS. The HiRadMat facility is dedicated to shock beam impact experiments. It allows testing of accelerator components with respect to the impact of high-intensity pulsed beams. It will provide a 440 GeV proton beam with a focal size down to 0.1 mm, thus providing very dense beam (energy/cross section). The transversal profile of the beam is considered to be Gaussian with a tunable σ from 0.1 mm to 2 mm. This facility will allow to study “high energy density” physics as the energy density will be high enough to create strong coupled plasma in the core of high-Z materials (copper, tungsten) and to produce strong enough shock waves to create a density depletion channel along the beam axis (tunneling effect). The paper introduces the layout of the experiment and the monitoring system to detect tunneling of protons through the target.
* N.A.Tahir et al. HB2010 Proc., Morschach, Switzerland. ** N.A.Tahir et al. NIMA 606(1-2) 2009 186. *** N.A.Tahir et al. 11th EPAC, Genoa, Italy, 2008, WEPP073. |
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THPS053 | Results from the HiRadMat Primary Beam Line Commissioning | 3547 |
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The High Radiation to Materials facility (HiRadMat) is a new experimental area at CERN, for studies of the impact of high-intensity pulsed beams on accelerator components and materials. The beam is delivered from the SPS by a new primary beam line, which has been constructed during the 2010/11 winter technical stop. The paper summarizes the construction phase and describes the results from the beam line commissioning in spring 2011. Beam parameter and aperture measurements are presented, as well as steering tests. A special emphasis has been put on the handling of the exceptionally flexible beam line optics in the control system. | ||
THPS088 | LHC Beam Impact on Materials Considering the Time Structure of the Beam | 3639 |
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The LHC is the world's largest and highest energy accelerator. Two counter-rotating beams can be accelerated up to 7 TeV and kept colliding for several hours. The energy stored in each beam is up to 362MJ, enough to melt 500 kg of copper. A fast loss of a small fraction of the beam can cause damage to a superconducting coil in a magnet. Primary beam collimators, one of the most robust parts of the machine protection, can be damaged with about 5% of the beam. An accident involving the entire beam is very unlikely but cannot be fully excluded. Understanding the consequences of such accidents is fundamental for the machine protection. Detailed numerical simulations have been carried out to assess the damage caused by full LHC beam impact on solid Cu and C cylinders. The energy loss of the protons is calculated with the FLUKA code and this data is used as input to a 2D hydrodynamic code BIG2, to study the thermodynamic and hydrodynamic response of the material. Since the target parameters change substantially during the time of impact, a new approach of running the two codes iteratively, has been developed. In this paper the results are presented and compared with the previous studies. | ||