CERN Accelerating science

Accelerator Physics

Nyeste elementer:
2020-10-06
17:58
A Vlasov approach to study transverse instabilities driven by electron clouds / Iadarola, Giovanni (CERN) ; Mether, Lotta (CERN) ; Mounet, Nicolas (CERN) ; Sabato, Luca
We present a linearized method to study transverse instabilities due to electron clouds. [...]
CERN-ACC-NOTE-2020-0054.
- 2020. - 22 p.
Full text

Detaljert visning - Lignende elementer
2020-10-06
17:47
MD3310 – Complex tune shift measurement at flat-top in the LHC / Amorim, David (Universite Grenoble-Alpes (FR)) ; Antipov, Sergey ; Biancacci, Nicolo (CERN) ; Buffat, Xavier (CERN) ; Giordano, Francesco (Universita e sezione INFN di Napoli (IT)) ; Hemelsoet, Georges-Henry (CERN) ; Levens, Tom (CERN) ; Metral, Elias (CERN) ; Mounet, Nicolas (CERN) ; Ribes Metidieri, Ariadna (University of Barcelona (ES)) et al.
This note summarises the MD3310 activity. [...]
CERN-ACC-NOTE-2020-0053.
- 2020. - 6 p.

Detaljert visning - Lignende elementer
2020-10-02
06:50
Linearized method for the study of transverse instabilities driven by electron clouds / Iadarola, Giovanni (CERN) ; Mether, Lotta (CERN) ; Mounet, Nicolas (CERN) ; Sabato, Luca (CERN)
We present a linearized method to study transverse instabilities due to electron clouds. It is based on an accurate and compact characterization of the cloud dipolar and quadrupolar forces, that can be easily obtained from quick single-pass numerical simulations. [...]
2020 - 15 p. - Published in : Phys. Rev. Accel. Beams 23 (2020) 081002 Fulltext from Publisher: PDF;

Detaljert visning - Lignende elementer
2020-10-01
06:01
Photo reflectivity and photo electron yield from technical surfaces / Liedl, A (Frascati) ; Angelucci, M (Frascati) ; La Francesca, E (Frascati ; Rome U.) ; Schäfers, F (Helmholtz-Zentrum, Berlin) ; Sertsu, M G (Helmholtz-Zentrum, Berlin) ; Siewert, F (Helmholtz-Zentrum, Berlin) ; Sokolov, A (Helmholtz-Zentrum, Berlin) ; Cimino, R (Frascati)
The knowledge of material properties is an essential stepto design particle accelerators and High Energy Colliders.During operation of these machines, the walls of the vac-uum chambers are subjected to bombardment of photonsand electrons. The detrimental interactions may be followedby issues related to vacuum and beam instability. [...]
2020 - 6 p. - Published in : CERN Yellow Rep. Conf. Proc. 7 (2020) 125-130 Fulltext from publisher: PDF;
In : ECLOUD’18: Proceedings of the Joint INFN-CERN-ARIES Workshop on Electron-Cloud Effects, La Biodola, Isola d'Elba, Italy, 3 - 7 Jun 2018, pp.125-130 (CERN-2020-007)

Detaljert visning - Lignende elementer
2020-10-01
06:01
Experiments with stable confined electron columns / Thoma, K I (Goethe U., Frankfurt (main)) ; Britten, V (Goethe U., Frankfurt (main)) ; Droba, M (Goethe U., Frankfurt (main)) ; Meusel, O (Goethe U., Frankfurt (main)) ; Podlech, H (Goethe U., Frankfurt (main)) ; Scheible, B (Goethe U., Frankfurt (main)) ; Schulte, K (Goethe U., Frankfurt (main))
Gabor Lenses were invented for focusing ion beams by the electric field of a confined electron column. In synchrotrons spontaneously occurring electron clouds have an influence on the beam dynamics. [...]
2020 - 3 p. - Published in : CERN Yellow Rep. Conf. Proc. 7 (2020) 143-146 Fulltext from publisher: PDF;
In : ECLOUD’18: Proceedings of the Joint INFN-CERN-ARIES Workshop on Electron-Cloud Effects, La Biodola, Isola d'Elba, Italy, 3 - 7 Jun 2018, pp.143-146 (CERN-2020-007)

Detaljert visning - Lignende elementer
2020-10-01
06:01
Electron cloud effects in SuperKEKB commissioning / Ohmi, K (KEK, Tsukuba ; Sokendai, Tsukuba) ; Flanagan, J (KEK, Tsukuba ; Sokendai, Tsukuba) ; Fukuma, H (KEK, Tsukuba ; Sokendai, Tsukuba) ; Ikeda, H (KEK, Tsukuba ; Sokendai, Tsukuba) ; Mulyani, E (KEK, Tsukuba ; Sokendai, Tsukuba) ; Shibata, K (KEK, Tsukuba ; Sokendai, Tsukuba) ; Suetsugu, Y (KEK, Tsukuba ; Sokendai, Tsukuba) ; Tobiyama, M (KEK, Tsukuba ; Sokendai, Tsukuba)
A vertical emittance growth (beam size blow-up) due to electron cloud has been observed in the positron low energy ring (LER) in Phase-I commissioning (2016) of SuperKEKB. The emittance growth is caused by fast head-tail instability due to wake force induced by electron cloud. [...]
2020 - 4 p. - Published in : CERN Yellow Rep. Conf. Proc. 7 (2020) 179-182 Fulltext from publisher: PDF;
In : ECLOUD’18: Proceedings of the Joint INFN-CERN-ARIES Workshop on Electron-Cloud Effects, La Biodola, Isola d'Elba, Italy, 3 - 7 Jun 2018, pp.179-182 (CERN-2020-007)

Detaljert visning - Lignende elementer
2020-10-01
06:01
Preliminary results obtained with the LHC Vacuum Pilot Sector / Buratin, E (CERN ; Ecole Polytechnique, Lausanne) ; Baglin, V (CERN) ; Henrist, B (CERN)
The Large Hadron Collider (LHC) is affected by electron cloud that reduces the quality of the beam, provokes instabilities, and increases the residual-gas pressure and heat load in the vacuum chambers. Synchrotron radiation, via photoelectron emission, plays also an important role in the electron cloud build-up. [...]
2020 - 6 p. - Published in : CERN Yellow Rep. Conf. Proc. 7 (2020) 195-200 Fulltext from publisher: PDF;
In : ECLOUD’18: Proceedings of the Joint INFN-CERN-ARIES Workshop on Electron-Cloud Effects, La Biodola, Isola d'Elba, Italy, 3 - 7 Jun 2018, pp.195-200 (CERN-2020-007)

Detaljert visning - Lignende elementer
2020-10-01
06:01
Simulations of synchrotron-radiation-induced electron production in the CESR vacuum chamber wall / Crittenden, J A (Cornell U., CLASSE) ; Poprocki, S (Cornell U., CLASSE) ; Rubin, D L (Cornell U., CLASSE) ; Sagan, D (Cornell U., CLASSE)
We report on calculations of electron production by synchrotron radiation absorbed in the vacuum chamber walls of the Cornell Electron Storage Ring (CESR). These photo-electrons are the source of electron clouds which limit the performance of storage rings by causing betatron tune shifts, instabilities and emittance growth. [...]
2020 - 12 p. - Published in : CERN Yellow Rep. Conf. Proc. 7 (2020) 183-194 Fulltext from publisher: PDF;
In : ECLOUD’18: Proceedings of the Joint INFN-CERN-ARIES Workshop on Electron-Cloud Effects, La Biodola, Isola d'Elba, Italy, 3 - 7 Jun 2018, pp.183-194 (CERN-2020-007)

Detaljert visning - Lignende elementer
2020-09-30
07:04
Instability caused by electron cloud in combined function magnets: the FERMILAB experience / Antipov, S A (CERN)
Electron cloud can lead to a fast instability in intense proton and positron beams in circular accelerators. In the Fermilab Recycler the electron cloud is confined within its combined function magnets. [...]
2020 - 6 p. - Published in : CERN Yellow Rep. Conf. Proc. 7 (2020) 91-96 Fulltext from publisher: PDF;
In : ECLOUD’18: Proceedings of the Joint INFN-CERN-ARIES Workshop on Electron-Cloud Effects, La Biodola, Isola d'Elba, Italy, 3 - 7 Jun 2018, pp.91-96 (CERN-2020-007)

Detaljert visning - Lignende elementer
2020-09-30
07:04
Coupled-bunch instabilities and related effects due to electron cloud in SuperKEKB LER / Tobiyama, Makoto (KEK, Tsukuba ; Sokendai, Tsukuba)
Coupled-bunch instabilities due to electron cloud effect have been observed in KEKB LER. The effect was clearly explained by the electron cloud effect (ECE) in the drift space by the numerical simulations. [...]
Geneva : CERN, 2020 - 6 p. - Published in : CERN Yellow Rep. Conf. Proc. 7 (2020) 21-26 Fulltext from publisher: PDF;
In : ECLOUD’18: Proceedings of the Joint INFN-CERN-ARIES Workshop on Electron-Cloud Effects, La Biodola, Isola d'Elba, Italy, 3 - 7 Jun 2018, pp.21-26 (CERN-2020-007)

Detaljert visning - Lignende elementer