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1.
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Characterisation of a large area silicon photomultiplier
/ Nagai, A. (Geneva U.) ; Alispach, C. (Geneva U.) ; Barbano, A. (Geneva U.) ; Coco, V. (CERN) ; della Volpe, D. (Geneva U.) ; Heller, M. (Geneva U.) ; Montaruli, T. (Geneva U.) ; Njoh, S. (Geneva U.) ; Renier, Y. (Geneva U.) ; Troyano-Pujadas, I. (Geneva U.)
This work illustrates and compares some methods to measure the most relevant parameters of silicon photo-multipliers (\sipm{}s), such as photon detection efficiency as a function of over-voltage and wavelength, dark count rate, optical cross-talk, afterpulse probability. For the measurement of the breakdown voltage, $V_{BD}$, several methods using the current-voltage $IV$ curve are compared, such as the "IV Model", the "relative logarithmic derivative", the "inverse logarithmic derivative", the "second logarithmic derivative", and the "third derivative" models [...]
arXiv:1810.02275.-
2019-12-21 - 15 p.
- Published in : Nucl. Instrum. Methods Phys. Res., A 948 (2019) 162796
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2.
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Characterization of Self-Modulated Electron Bunches in an Argon Plasma
/ Groß, Matthias (DESY, Zeuthen) ; Boonpornprasert, Prach (DESY, Zeuthen) ; Brinkmann, Reinhard (DESY) ; Chen, Ye (DESY, Zeuthen) ; Engel, Johannes (DESY, Zeuthen) ; Good, James (DESY, Zeuthen) ; Grüner, Florian (CFEL, Hamburg ; Hamburg U.) ; Huck, Holger (DESY, Zeuthen) ; Isaev, Igor (DESY, Zeuthen) ; Krasilnikov, Mikhail (DESY, Zeuthen) et al.
The self-modulation instability is fundamental for the plasma wakefield acceleration experiment of the AWAKE (Advanced Wakefield Experiment) collaboration at CERN where this effect is used to generate proton bunches for the resonant excitation of high acceleration fields. Utilizing the availability of flexible electron beam shaping together with excellent diagnostics including an RF deflector, a supporting experiment was set up at the electron accelerator PITZ (Photo Injector Test facility at DESY, Zeuthen site), given that the underlying physics is the same. [...]
2018 - 3 p.
- Published in : (2018) , pp. TUPML046
- Published in : J. Phys.: Conf. Ser. 1067 (2018) 042012
Fulltext: PDF;
In : 9th International Particle Accelerator Conference, Vancouver, Canada, 29 Apr - 4 May 2018, pp.TUPML046
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3.
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Publication
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4.
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Observation of High Transformer Ratio Plasma Wakefield Acceleration
/ Loisch, Gregor (DESY, Zeuthen) ; Asova, Galina (DESY, Zeuthen ; Sofiya, Inst. Nucl. Res.) ; Boonpornprasert, Prach (DESY, Zeuthen) ; Brinkmann, Reinhard (DESY) ; Chen, Ye (DESY, Zeuthen) ; Engel, Johannes (DESY, Zeuthen) ; Good, James (DESY, Zeuthen) ; Gross, Matthias (DESY, Zeuthen) ; Grüner, Florian (U. Hamburg (main) ; CFEL, Hamburg) ; Huck, Holger (DESY, Zeuthen) et al.
Particle-beam-driven plasma wakefield acceleration (PWFA) enables various novel high-gradient techniques for powering future compact light-source and high-energy physics applications. Here, a driving particle bunch excites a wakefield response in a plasma medium, which may rapidly accelerate a trailing witness beam. [...]
2018 - 6 p.
- Published in : Phys. Rev. Lett. 121 (2018) 064801
Fulltext: PDF;
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5.
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ebook
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6.
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Mitigation of ground motion effects in linear accelerators via feed-forward control
/ Pfingstner, J (CERN) ; Artoos, K (CERN) ; Charrondiere, C (CERN) ; Janssens, St (CERN) ; Patecki, M (CERN) ; Renier, Y (CERN) ; Schulte, D (CERN) ; Tomás, R (CERN) ; Jeremie, A (Annecy, LAPP) ; Kubo, K (Sokendai, Tsukuba ; KEK, Tsukuba) et al.
Ground motion is a severe problem for many particle accelerators, since it excites beam oscillations, which decrease the beam quality and create beam-beam offset (at colliders). Orbit feedback systems can only compensate ground motion effects at frequencies significantly smaller than the beam repetition rate. [...]
2014 - 14 p.
- Published in : Phys. Rev. Spec. Top. Accel. Beams 17 (2014) 122801
APS Open Access article: PDF;
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7.
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Experimental Validation of a Novel Compact Focusing Scheme for Future Energy-Frontier Linear Lepton Colliders
/ White, G R (SLAC) ; Ainsworth, R (Oxford U., JAI) ; Akagi, T (Hiroshima U.) ; Alabau-Gonzalvo, J (CERN) ; Angal-Kalinin, D (Daresbury) ; Araki, S (KEK, Tsukuba) ; Aryshev, A (KEK, Tsukuba) ; Bai, S (Beijing, Inst. High Energy Phys.) ; Bambade, P (Orsay, LAL) ; Bett, D R (Oxford U., JAI) et al.
/ATF2
A novel scheme for the focusing of high-energy leptons in future linear colliders was proposed in 2001 [ P. Raimondi and A. [...]
2014 - 6 p.
- Published in : Phys. Rev. Lett. 112 (2014) 034802
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8.
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Experimental Verification Towards Feed-Forward Ground Motion Mitigation at ATF2
/ Pfingstner, Juergen (CERN) ; Artoos, Kurt (CERN) ; Charrondière, Cedric (CERN) ; Janssens, Stef (CERN) ; Patecki, Marcin (CERN) ; Renier, Yves (CERN) ; Schulte, Daniel (CERN) ; Tomás, Rogelio (CERN) ; Jeremie, Andrea ; Kubo, Kiyoshi et al.
Without counter measures, ground motion effects would deteriorate the performance of future linear colliders to an unacceptable level. An envisioned new ground motion mitigation method (based on feed-forward control) has the potential to improve the performance and to reduce the system cost compared to other proposed methods. [...]
CERN-ACC-2014-388.-
2014 - 4 p.
- Published in : (2014) , pp. MOPP032
Fulltext: PDF; External link: JACoW server
In : 27th Linear Accelerator Conference, Geneva, Switzerland, 31 Aug - 5 Sep 2014, pp.MOPP032
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9.
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Turn by Turn Measurements at the KEK-ATF
/ Renier, Y (CERN) ; Papaphilippou, Y (CERN) ; Tomas, R (CERN) ; Wendt, M (CERN) ; Eddy, N (Fermilab) ; Kubo, K (KEK, Tsukuba) ; Kuroda, S (KEK, Tsukuba) ; Naito, T (KEK, Tsukuba) ; Okugi, T (KEK, Tsukuba) ; Terunuma, N (KEK, Tsukuba) et al.
The ATF damping ring has been upgraded with new read-out electronics for the beam position monitors (BPM), capable to acquire the beam orbits on a turn-by-turn basis, as well as in a high resolution averaging mode. The new BPM system allows to improve optic corrections and to achieve an even smaller vertical emittance (<2pm). [...]
CERN-ACC-2013-0154.-
Geneva : CERN, 2013 - 3 p.
Fulltext: PDF;
In : 4th International Particle Accelerator Conference, Shanghai, China, 12 - 17 May 2013, pp.1664
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10.
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Detection of Ground Motion effects on the beam trajectory at ATF2
/ Renier, Y (CERN) ; Pfingstner, J (CERN) ; Tomas, R (CERN) ; Schulte, D (CERN)
The ATF2 experiment is currently demonstrating the feasibility of the beam delivery system for the future linear collider. The orbit feedback is very critical to obtain the nanometer vertical beam size at the interaction point and in the case of CLIC, ground motion effects on the beam must be corrected. [...]
CERN-ATS-2012-186.-
Geneva : CERN, 2012 - 3 p.
- Published in : Conf. Proc.: C1205201 (2012) , pp. TUPPR060
Fulltext: PDF; External link: Published version from JaCoW
In : 3rd International Particle Accelerator Conference, New Orleans, LA, USA, 20 - 25 May 2012, pp.1954
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