| Paper | Title | Page |
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| PM14 | Upgrade Of The ESRF Fluorescent Screen Monitors | 125 |
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| The ESRF injector system contains 23 Fluorescent Screen monitors: 4 in the TL-1 transferline (200 MeV), 8 in the Booster, and 11 in the TL-2 transferline (6 GeV). They are based on Chromium doped Alumina screens that are pneumatically inserted at 45o angle in the beam path with an optical system, at 90o angle, collecting and focusing the emitted light onto a low-cost CCD camera with standard 75Ω video output. Serving mainly alignment purposes in the past 10 years, the present upgrade aims at a 200 μm fwhm resolution for beam-size and profile measurements. The particularity of the Alumina screen not in vacuum but in atmosphere will be explained. Details of the mechanics, the optic system and a cost-efficient way of light flux adjustment will be given. The analysis of the factors determining the ultimate spatial resolution will show that it is dominated by the screen characteristics. Results obtained with different screen material will be presented. | ||
| DW01 | Machine Protection And Interlock Systems
Session 1: Wednesday (11:15--13:00 Hrs) |
259 |
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| The purpose of a MPS is to protect the equipment against abnormal beam behaviour. High intense and high brilliant particle, photon and X-ray beams are capable of causing significant damage to components in a fraction of a second, i.e. too fast for any human reaction. The aim of this session is to discuss existing and planned MPS with both their specific and their general requirements. Among points to be reviewed: the choice of sensors and components, the logic, the strategy, etc. in view of the need for the MPS to be fail-proof. Some typical questions that will be raised: What are the criteria for determining that an alarm situation has been reached and what is the subsequent action of the system? Very often the MPS may allow different beam modes, depending on beam permit inputs. Which kind of beam modes exist and what are the input signals? How are these systems integrated with the accelerator controls and what is the impact on their operation? This session will include a few very brief presentations of existing and planned MPS' from different machines to illustrate the above questions and to stimulate the subsequent discussion. |