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ATS UNCLASSIFIED

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2022-08-12
18:32
Report from LHC MD 3312: Replicating HL-LHC DA / Dilly, Joschua Werner (Humboldt University of Berlin (DE)) ; Albert, Markus (CERN) ; Carlier, Felix Simon (CERN) ; Coello De Portugal - Martinez Vazquez, Jaime Maria ; Dalena, Barbara (Université Paris-Saclay (FR)) ; Fol, Elena (CERN) ; Hofer, Michael (CERN) ; Maclean, Ewen Hamish (CERN) ; Malina, Lukas ; Persson, Tobias Hakan Bjorn (CERN) et al.
During MD3312 on the 30.10.2018 the non-linear conditions in the insertion regions of the planned HL-LHC were replicated to our best knowledge and within the capabilities of the hardware currently available in the LHC: A flat ATS-optics scheme of beta* = 15cm / 60cm in IP1 and IP5 was applied as well as sextupole, octupole and (normal) dodecapole errors were introduced into the machine via the corrector magnets in the interaction regions. [...]
CERN-ACC-NOTE-2022-0021. - 2022.

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2022-07-14
16:49
Prospects for beam-based study of dodecapole nonlinearities in the CERN High-Luminosity Large Hadron Collider / Maclean, Ewen Hamish (CERN) ; Carlier, Felix Simon (CERN) ; Dilly, Joschua Werner (Humboldt University of Berlin (DE)) ; Giovannozzi, Massimo (CERN) ; Tomas Garcia, Rogelio (CERN)
Nonlinear magnetic errors in low-β insertions can have a significant impact on the beam-dynamics of a collider such as the CERN Large Hadron Collider (LHC) and its luminosity upgrade (HL-LHC). [...]
CERN-ACC-NOTE-2022-0020. - 2022. - 34 p.

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2022-07-11
11:32
Design of a new SPS injection system via numerical optimisation / Waagaard, Elias Walter (Uppsala University (SE)) ; Barnes, Mike (CERN) ; Bartmann, Wolfgang (CERN) ; Borburgh, Jan (CERN) ; Ducimetiere, Laurent Sylvain (CERN) ; Kramer, Thomas (CERN) ; Stadlbauer, Tobias (CERN) ; Trubacova, Pavlina (CERN) ; Velotti, Francesco Maria (CERN)
The Super Proton Synchrotron (SPS) injection system plays a fundamental role to preserve the quality of injected high-brightness beams for the Large Hadron Collider (LHC) physics program and to maintain the maximum storable intensity. [...]
CERN-ACC-NOTE-2022-0019. - 2022. - 6 p.
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2022-07-01
13:40
Measurement of Excess Noise in Thin Film and Metal Foil Resistor Networks / Beev, Nikolai (CERN)
Low-frequency resistance fluctuations cause excess noise in biased resistors. The magnitude of these fluctuations varies significantly between different resistor types. [...]
CERN-ACC-2022-0010.- Geneva : CERN, 2022
In : 2022 IEEE International Instrumentation and Measurement Technology Conference (I2MTC), Ottawa, Ca, 16 - 19 May 2022

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2022-07-01
13:34
A Metrology-grade Digitizer for Power Converters in the High Luminosity Large Hadron Collider / Beev, Nikolai (CERN) ; Cerqueira Bastos, Miguel (CERN) ; Martino, Michele (CERN) ; Valuch, Daniel (CERN)
The High Luminosity Large Hadron Collider project at CERN requires performance improvements in the precision powering of magnets, in particular for the new Nb3Sn based Inner Triplet magnets that provide the final focusing of the hadron beams at the interaction points of the ATLAS and CMS detectors. This work presents a new digitizer, the HPM7177, which is part of the signal chain for high precision measurements of magnet current..
CERN-ACC-2022-0009.- Geneva : CERN, 2022
In : 2022 IEEE International Instrumentation and Measurement Technology Conference (I2MTC), Ottawa, Ca, 16 - 19 May 2022

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2022-06-24
12:20
A COMPACT SYNCHROTRON FOR ADVANCED CANCER THERAPY WITH HELIUM AND PROTON BEAMS / Vretenar, Maurizio (CERN) ; Angoletta, Maria Elena (CERN) ; Bisoffi, Giovanni (Universita e INFN, Legnaro (IT)) ; Borburgh, Jan (CERN) ; Bottura, Luca (CERN) ; Palskis, Kristaps (Riga Technical University (LV)) ; Tranquille, Gerard Alain (CERN) ; Benedetto, Elena (SEEIIST Association (CH)) ; Sapinski, Mariusz (Paul Scherrer Institute (CH)) ; Taylor, Rebecca Louise (CERN)
Recent years have seen an increased interest in the use of helium for radiation therapy of cancer. [...]
CERN-ACC-NOTE-2022-0018. - 2022. - 4 p.

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2022-06-17
12:15
KlyC. The 1D/1.5D large signal computer code for the Klystron simulations. User Manual. Version 6. (included CGUN for the 2D electron beam optics simulation). / Cai, Jinchi (Lancaster University (GB)) ; Syratchev, Igor (CERN) ; Burt, Graeme Campbell (Lancaster University (GB))
Almost all accurate and efficient 2D large-signal codes for klystron simulations are proprietary and are not freely available to the wider klystron community [...]
CERN-ACC-2022-0008 ; CLIC-Note-1177. - 2022. - 31 p.
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2022-06-17
12:05
DC Beam Stability issues in the first commercial prototype of a High Efficiency 8MW X-Band Klystron / Syratchev, Igor (CERN) ; Un Nisa, Zaib (CERN) ; Cai, Jinchi (Lancaster University (GB)) ; Burt, Graeme Campbell (Lancaster University (GB)) ; Anno, Toshiro (Canon Electron Tubes & Devices Co., Ltd (CETD))
The first commercial prototype of the new High Efficiency (HE) 8MW klystron was built and tested at CETD in the fall of 2021. [...]
CERN-ACC-2022-0007 ; CLIC-Note-1176. - 2022. - 13 p.
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2022-06-16
12:17
Amorphous and Diamond-Like Carbon coatings for SEY reduction of dielectric materials for accelerating structure applications / Grudiev, Alexej (CERN) ; Neupert, Holger (CERN) ; Vollenberg, Wilhelmus (CERN) ; Jing, Chunguang (Euclid Techlabs LLC) ; Poddar, Shashi (Euclid Techlabs LLC) ; Freemire, Ben (Euclid Techlabs LLC)
Multipactor discharges in dielectric accelerating structures are a major limitation on the performance of this otherwise very promising technology for future high energy physics machines and other applications. [...]
CERN-ACC-2022-0006 ; CLIC-Note-1175. - 2022. - 16 p.
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2022-06-15
15:26
Carbon ion compact medical synchrotron: key parameters / Benedetto, Elena (SEEIIST Association (CH))
The report provides the key parameters for a compact medical synchrotron for carbon and other ions [...]
CERN-ACC-NOTE-2022-0017 ; NIMMS-Note 008. - 2022. - 7 p.
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