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| MOMMU003 |
Aperture Meter for the Large Hadron Collider |
operation, alignment, GUI, collimation |
70 |
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- G.J. Müller, K. Fuchsberger, S. Redaelli
CERN, Geneva, Switzerland
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The control of the high intensity beams of the CERN Large Hadron Collider (LHC) is particular challenging and requires a good modeling of the machine and monitoring of various machine parameters. During operation it is crucial to ensure a minimal distance between the beam edge and the aperture of sensitive equipment, e.g. the superconducting magnets, which in all cases must be in the shadow of the collimators that protect the machine. Possible dangerous situations must be detected as soon as possible. In order to provide the operator with information about the current machine bottlenecks an aperture meter application was developed based on the LHC online modeling toolchain. The calculation of available free aperture takes into account the best available optics and aperture model as well as the relevant beam measurements. This paper describes the design and integration of this application into the control environment and presents results of the usage in daily operation and from validation measurements.
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Slides MOMMU003 [0.565 MB]
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Poster MOMMU003 [0.694 MB]
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| MOPKS023 |
An Overview of the Active Optics Control Strategy for the Thirty Meter Telescope |
controls, alignment, real-time, operation |
211 |
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- M.J. Sirota, G.Z. Angeli, D.G. MacMynowski
TMT, Pasadena, California, USA
- G.A. Chanan
UCI, Irvine, California, USA
- M.M. Colavita, C. Lindensmith, C. Shelton, M. Troy
JPL, Pasadena, California, USA
- T.S. Mast, J. Nelson
UCSC, Santa Cruz, USA
- P.M. Thompson
STI, Hawthorne, USA
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Funding: This work was supported by the Gordon and Betty Moore Foundation
The primary (M1), secondary (M2) and tertiary (M3) mirrors of the Thirty Meter Telescope (TMT), taken together, have over 10,000 degrees of freedom. The vast majority of these are associated with the 492 individual primary mirror segments. The individual segments are converted into the equivalent of a monolithic thirty meter primary mirror via the Alignment and Phasing System (APS) and the M1 Control System (M1CS). In this paper we first provide an introduction to the TMT. We then describe the overall optical alignment and control strategy for the TMT and follow up with additional descriptions of the M1CS and the APS. We conclude with a short description of the TMT error budget process and provide an example of error allocation and predicted performance for wind induced segment jitter.
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Poster MOPKS023 [2.318 MB]
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| MOPMN018 |
Toolchain for Online Modeling of the LHC |
controls, simulation, software, framework |
277 |
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- G.J. Müller, X. Buffat, K. Fuchsberger, M. Giovannozzi, S. Redaelli, F. Schmidt
CERN, Geneva, Switzerland
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The control of high intensity beams in a high energy, superconducting machine with complex optics like the CERN Large Hadron Collider (LHC) is challenging not only from the design aspect but also for operation. To support the LHC beam commissioning, operation and luminosity production, efforts were recently devoted towards the design and implementation of a software infrastructure aimed to use the computing power of the beam dynamics code MADX-X in the framework of the Java-based LHC control and measurement environment. Alongside interfacing to measurement data as well as to settings of the control system, the best knowledge of machine aperture and optic models is provided. In this paper, we present the status of the toolchain and illustrate how it has been used during commissioning and operation of the LHC. Possible future implementations are also discussed.
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Poster MOPMN018 [0.562 MB]
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