# PS Complex

2018-06-29
16:41
 Design report of a 1 kW power ampliﬁer for the PS RF 10 MHz system / Favia, Giorgia (CERN) The ability of the PS 10 MHz RF system to cope with high intensity beams mainly depends on the fast RF feedback loop that drastically reduces the cavity impedance seen by the beam. [...] CERN-ACC-NOTE-2018-0048. - 2018. - 21 p. Full text

2018-06-12
10:25
 Redesign of CERN LINAC3 RFQ for Lead 29+ / Benedetti, Stefano (CERN) ; Bellodi, Giulia (CERN) ; Lallement, Jean-Baptiste (CERN) ; Lombardi, Alessandra (CERN) CERN Linac3 is at the heart of the CERN Heavy Ion Facility, providing 4.2 MeV/u ion beams to the Low Energy Ion Ring (LEIR) [...] CERN-ACC-NOTE-2018-0044. - 2018.

2018-06-12
10:20
 The 2017 Xe run at CERN Linac3: measurements and beam dynamics simulations / Benedetti, Stefano (CERN) ; Bellodi, Giulia (CERN) ; Kuchler, Detlef (CERN) ; Lombardi, Alessandra (CERN) ; Wenander, Fredrik John Carl (CERN) ; Toivanen, Ville Aleksi At CERN quark-gluon plasma and ﬁxed target ion experiments are performed thanks to the Heavy-ion Facility, composed by diﬀerent accelerators. [...] CERN-ACC-NOTE-2018-0043. - 2018.

2018-06-06
17:55
 A Generic, Modular and User Transparent Protocol Scheme for Inter-FPGA Communication using Serial Links / Vulliez, Cedric Paul CERN, the European Organization for Nuclear Research, is a European research organization that operates the largest particle physics laboratory in the world [...] CERN-THESIS-2017-390 - 117 p.

Fulltext
2018-06-03
06:00
 Cryogenic upgrade of the low heat load liquid helium cryostat used to house the Cryogenic Current Comparator in the Antiproton Decelerator at CERN / Lees, A (CERN) ; Koettig, T (CERN) ; Fernandes, M (CERN) ; Tan, J (CERN) The Cryogenic Current Comparator (CCC) and its purpose built cryostat were installed in the low-energy Antiproton Decelerator (AD) at CERN in 2015. A pulse-tube cryocooler recondenses evaporated helium to liquid at 4.2 K filling the helium vessel of the cryostat at an equivalent cooling power of 0.69 W. [...] 2017 - Published in : IOP Conf. Ser. Mater. Sci. Eng. 278 (2017) 012193 Fulltext: PDF; In : 2017 Cryogenic Engineering Conference and International Cryogenic Materials Conference, Madison, WI, USA, 9 - 13 Jul 2017, pp.012193

2018-05-29
06:51
 Experimental benchmark of the NINJA code for application to the Linac4 H− ion source plasma / Briefi, S (U. Augsburg (main)) ; Mattei, S (CERN ; CRPP, Lausanne) ; Rauner, D (U. Augsburg (main) ; Garching, Max Planck Inst. Plasmaphys.) ; Lettry, J (CERN) ; Tran, M Q (CRPP, Lausanne) ; Fantz, U (U. Augsburg (main) ; Garching, Max Planck Inst. Plasmaphys.) For a dedicated performance optimization of negative hydrogen ion sources applied at particle accelerators, a detailed assessment of the plasma processes is required. [...] 2017. - 17 p. Full text - Fulltext

2018-05-26
06:12
 The CERN/ISOLDE Laser Ion Source / Marsh, B A (CERN) ; Fedosseev, V N (CERN) ; Chrysalidis, K (CERN) ; Day Goodacre, T (CERN) ; Larmonier, P (CERN) ; Rossel, R E (CERN) ; Rothe, S (CERN) ; Seiffert, C (CERN) ; Wendt, K (Mainz U., Inst. Phys.) Laser resonance photo-ionization an essential aspect of radioactive ion beam production for fundamental and applied physics research. The laser ion source of the ISOLDE facility, described here, is the most versatile of its type worldwide.. 2017 - Published in : 10.1364/CLEO_SI.2017.SF1K.5 External link: Fulltext

2018-05-25
07:03
 Effects of the extraction voltage applied by the puller-electrode on the H$^−$ extraction in the Linac4 negative ion source / Abe, S (Keio U.) ; Nishioka, S (Keio U.) ; Mattei, S (CERN) ; Hatayama, A (Keio U.) ; Lettry, J (CERN) In order to understand the H$^−$ extraction mechanism and investigate the effect of the extraction voltage applied by the puller-electrode on the H$^−$ extraction in the Linac4 negative ion source, we are developing a 2D3V-PIC (two dimensions in the real space and three dimensions in the velocity space, Particle in Cell) model with volume produced H$^−$ ions. It is shown that how to take the magnetic filter field direction is important for the 2D modeling to take into account the important 3D effect of electron $E \times B$ drift. [...] 2017 - 8 p. - Published in : AIP Conf. Proc. 1869 (2017) 030051 In : 5th International Symposium on Negative Ions, Beams and Sources, Oxford, United Kingdom, 12 - 16 Sep 2016, pp.030051

2018-05-24
06:01
 Numerical simulation of the RF plasma discharge in the Linac4 H$^−$ ion source / Mattei, S (CERN ; CRPP, Lausanne) ; Nishida, K (Keio U.) ; Onai, M (Keio U.) ; Lettry, J (CERN) ; Tran, M Q (CRPP, Lausanne) ; Hatayama, A (Keio U.) This paper presents a Particle-In-Cell Monte Carlo Collision simulation of the Radio-Frequency (RF) plasma heating in the Linac4 H$^−$ ion source at CERN. The model self-consistently takes into account the electromagnetic field generated by the RF coil, the external static magnetic fields and the resulting plasma response, including a kinetic description of the charged species (e$^−$, H$^+$, H$^+_2$, H$^+_3$, H$^−$), as well as the atomic and molecular (vibrationally resolved) populations. [...] 2017 - 7 p. - Published in : AIP Conf. Proc. 1869 (2017) 030018 In : 5th International Symposium on Negative Ions, Beams and Sources, Oxford, United Kingdom, 12 - 16 Sep 2016, pp.030018

2018-05-24
06:01
 Influence of the cusp field on the plasma parameters of the Linac4 H− ion source / Briefi, S (U. Augsburg (main)) ; Mattei, S (CERN) ; Lettry, J (CERN) ; Fantz, U (U. Augsburg (main) ; Garching, Max Planck Inst. Plasmaphys.) When the H$^−$ ion source of CERN’s Linac4 is operated in volume mode, a maximum of the extracted current is obtained at varying RF power. The power required for this maximum and its absolute value is strongly influenced by the cusp magnets installed at the source for electron confinement: without magnets, 15−20 mA are typically obtained at 20 kW whereas with magnets a factor of two more power is needed and 25−30 mA are achieved. [...] 2017 - 10 p. - Published in : AIP Conf. Proc. 1869 (2017) 030016 In : 5th International Symposium on Negative Ions, Beams and Sources, Oxford, United Kingdom, 12 - 16 Sep 2016, pp.030016