| Paper |
Title |
Other Keywords |
Page |
| MOP101 |
Design and Manufacturing Challenges of the SSR1 Current Leads for PIP-II |
cryomodule, vacuum, instrumentation, cryogenics |
329 |
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- S. Cheban, D. Passarelli, V. Roger
Fermilab, Batavia, Illinois, USA
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The SSR1 cryomodule contains eight 325 MHz superconducting single spoke cavities and four solenoid-based focusing lenses operating at 2 K. The focusing lens for SSR1 cryomodule, is a superconducting magnet surrounded by a helium box which will be filled with liquid helium. The magnet assembly is composed of one solenoid with operating current 70 A and 2 quadrupoles correctors with operating current 45 A. The conduction cooled current leads will be used to power magnets. The details of current leads design, fabrication and room temperature qualification will be presented. Main emphasis will be put on the design and production process challenges and possible solutions to fulfilled operation requirement under low temperature conditions.
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| DOI • |
reference for this paper
※ https://doi.org/10.18429/JACoW-SRF2019-MOP101
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| About • |
paper received ※ 28 June 2019 paper accepted ※ 30 June 2019 issue date ※ 14 August 2019 |
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| THP083 |
Quadrupole Scan Transverse Emittance Measurements at HZDR ELBE |
quadrupole, emittance, experiment, electron |
1100 |
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- S. Ma, A. Arnold, A.A. Ryzhov, J. Schaber, J. Teichert, R. Xiang, K. Zhou
HZDR, Dresden, Germany
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Two quadrupoles and one screen are used for beam transverse emittance measurements at HZDR ELBE. In this paper, the emittance calculated with two different methods, one with thin-lens approximation and the other one without this approximation, are compared and analized. To analyze the measurement error, quadrupole calibration is need. Two aspects about quadrupole analysis are made. The first one is quadrupole¿s effective length and strength and the second one is quadrupole¿s converged or diverged ability in reality.
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Poster THP083 [1.726 MB]
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| DOI • |
reference for this paper
※ https://doi.org/10.18429/JACoW-SRF2019-THP083
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| About • |
paper received ※ 25 June 2019 paper accepted ※ 03 July 2019 issue date ※ 14 August 2019 |
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| THP104 |
Numerical Estimation of Beam Break-Up Instability in TESLA Cavities |
dipole, cavity, solenoid, linac |
1178 |
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- V. Volkov, V.M. Petrov
BINP SB RAS, Novosibirsk, Russia
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In this article the numerically estimated BBU instability behaviors of a 9 cell superconducting TESLA cavity are presented for first two pass-band trapped dipole modes (18 in all). The given BBU threshold current values are calculated by the method of beam energy gain averaging on phases of dipole mode fields. BBU instability behaviors in cases of applying the cavities in Linacs as well in Energy Recovery Linacs (ERLs) are considered. The BBU influence on beam emittance degradation is demonstrated. Examples for suppression of beam BBU oscillations by a solenoid focusing and applying of an external RF generator with a feedback are visualized.
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| DOI • |
reference for this paper
※ https://doi.org/10.18429/JACoW-SRF2019-THP104
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| About • |
paper received ※ 23 June 2019 paper accepted ※ 02 July 2019 issue date ※ 14 August 2019 |
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reference for this paper using
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