380230 SzGeCERN 20211122212437.0 oai:cds.cern.ch:380230 cerncds:THESES Inspire 476909 eng TESLA-98-20 Schilcher, T Vector Sum control of pulsed accelerating fields in Lorentz Force Detuned Superconducting Cavities Hamburg DESY 1998 125 p paper Presented on Aug 1998 PhD Hamburg Univ. 1998 SzGeCERN Engineering THESIS CERN Depot 4, bldg. 500-S-023 (DE4) Thesis-1998-Schilcher h 199808 14 20100316 2000 CER01 19990225 PUBLIC 0001 000305802CER https://catalogue.library.cern/legacy/380230 THESIS Hidden MIGRATED 702659 SzGeCERN 20251125144232.0 oai:cds.cern.ch:702659 cerncds:FULLTEXT INTINT 0001492 WAI01 000005205 eng CERN-SL-Note-2001-023-HRF SL-Note-2001-023-HRF Tückmantel, Joachim Control Instabilities in a Pulsed Multi-Cavity RF System with Vector Sum Feedback (A Mathematical Analysis) rev. version 2001 Geneva CERN 25 Jun 2001 mult. p Upcoming projects relying on pulsed linear accelerators intend to use superconducting RF systems. Cost reasons suggest driving several cavities by a common transmitter, controlled over a vector sum feedback system, possibly supported by a feed forward system. Numerical simulations hint that such a system may become uncontrollable under certain conditions. In the present paper, for a model very close to reality, we will present a mathematical proof that in fact spontaneous symmetry braking is possible for these configurations, defining also the precise conditions under which it will take place. These can be used as an estimate for the real RF system stability limits. The listing of a small program demonstrating the mechanism numerically for two cavities is attached. SIS SLNOTE2003 CLAS1 SzGeCERN Accelerators and Storage Rings CERN Pulsed linear accelerators CERN superconducting CERN RF systems CERN cavity CERN CERN Internal Note INTNOTE PUBLSL RF : Radio Frequency XX XX SL CERN. Geneva. SPS and LHC Division HRF CERN Archives. Bldg. 61-S-001 O0562 http://documents.cern.ch/cgi-bin/setlink?base=internal&categ=sl&id=sl-note-2001-023 Fulltext http://cds.cern.ch/record/702659/files/sl-note-2001-023.pdf Fulltext thomas.baron@cern.ch n 200350 04 20100830 0942 CER01 20031219 PUBLIC 000414598CER SLINTNOTE NOTE 702471 SzGeCERN 20251125144839.0 oai:cds.cern.ch:702471 cerncds:FULLTEXT INTINT 0001309 WAI01 000005030 CERN-SL-Note-98-051-RF eng SL-Note-98-051-RF Boussard, Daniel Phase loop on vector sum signal 1998 Geneva CERN 14 Aug 1998 5 p Note SIS SLNOTE2003 CLAS1 CERN-SPSARCHIVE SL-RF SzGeCERN Accelerators and Storage Rings CERN Phase loop CERN CERN Internal Note INTNOTE PUBLSL XX XX Ciapala, Edmond CERN SL CERN. Geneva. SPS and LEP Division RF CERN Archives. Bldg. 61-S-001 O0559 2640 34337 http://cds.cern.ch/record/702471/files/sl-note-98-051.pdf Fulltext veronique.bouvier@cern.ch 19980814 n 200350 04 20100830 0941 CER01 20031219 PUBLIC 000414403CER SLINTNOTE NOTE 508767 SzGeCERN 20251210122802.0 oai:cds.cern.ch:508767 cerncds:FULLTEXT SPIRES 4693213 Inspire 560788 CERN-OPEN-2001-052 eng CERN-NEUTRINO-FACTORY-Note-82 CERN-NUFACT-Note-82 SL-Note-2001-023-HRF CERN-SL-Note-2001-023-HRF Tückmantel, Joachim Control Instabilities in a Pulsed Multi-Cavity RF System with Vector Sum Feedback (A Mathematical Analysis) 052 2001 Geneva CERN 31 May 2001 30 p paper Upcoming projects relying on pulsed linear accelerators intend to use superconducting RF systems. Cost reasons suggest driving several cavities by a common transmitter, controlled over a vector sum feedback system, possibly supported by a feed forward system. Numerical simulations hint that such a system may become uncontrollable under certain conditions. In the present paper, for a model very close to reality, we will present a mathematical proof that in fact spontaneous symmetry braking is possible for these configurations, defining also the precise conditions under which it will take place. These can be used as an estimate for the real RF system stability limits. The listing of a small program demonstrating the mechanism numerically for two cavities is attached. 20010717SLAC CERN EDS CLAS1 NUFACT-Note SzGeCERN Accelerators and Storage Rings CERN INTNOTE NUFACT PUBLSL XX XX SL CERN Central Library CERN-OPEN-2001-052 CERN Central Library CERN-NUFACT-Note-82 2544 291119 http://cds.cern.ch/record/508767/files/open-2001-052.pdf Access to fulltext document Nadia.Fisher@cern.ch CERN n 200129 04 20101108 1410 CER01 20010712 PUBLIC 002264342CER SLINTNOTE NOTE 0002 681621 SzGeCERN 20161219115827.0 eng Borghes, R Design Experience in Developing Control and Data Acquisition Systems Based on The PXI and CPXI Buses for Beam Diagnostics 2003 SIS PCAPAC00-2003 SzGeCERN Accelerators and Storage Rings SzGeCERN Controlling Accelerator Subsystems and Experiments ARTICLE Presacco, R Galimberti, A http://desyntwww.desy.de/pcapac/Proceedings/ID/076/076.htm Published version Laboratorio Diagnostica Linee, Sincrotrone Trieste n 200345 13 20070208 2035 CER01 20031107 439714 e-proc. 076 hamburg20001009 PUBLIC 002408112CER ARTICLE 532648 SzGeCERN 20161219093323.0 oai:cds.cern.ch:532648 cerncds:FULLTEXT 2289640CERCER eng Galimberti, A Sincrotrone Trieste, Trieste A Control And Data Acquisition System Based On The PXI Bus For The New Photon Beam Position Monitor Prototype 1999 SIS ICALEPCS99-2002 SzGeCERN Accelerators and Storage Rings ARTICLE Appolonio, M Sincrotrone Trieste, Trieste Presacco, R Politecnico di Milano, Milano http://documents.cern.ch/archive/electronic/other/uploader/ICAL/tc1p46.pdf Published version http://cds.cern.ch/record/532648/files/tc1p46.pdf Published version n 200201 13 20071128 1013 CER01 20020110 390149 e-proc. 418 trieste991004 PUBLIC 002289640CER ARTICLE 723515 SzGeCERN eng Bulzacchelli, J F A Superconducting Bandpass Delta-sigma Modulator For Direct Analog-to-digital Conversion Of Microwave Radio Cambridge, MA MIT 2003 mult. p Not held by the CERN library PhD Massachusetts Inst. Technology 2003 Direct analog-to-digital conversion of multi-GHz radio frequency (RF) signals is the ultimate goal in software radio receiver design but remains a daunting challenge for any technology. This thesis examines the potential of superconducting technology for realizing RF analog-to- digital converters (ADCs) with improved performance. A bandpass delta-sigma (&Delta;&Sigma;) modulator is an attractive architecture for digitizing narrowband signals with high linearity and a large signal-to-noise ratio (SNR). The design of a superconducting bandpass &Delta;&Sigma; modulator presented here exploits several advantages of superconducting electronics: the high quality factor of resonators, the high sampling rates of comparators realized with Josephson junctions, natural quantization of voltage pulses, and high circuit sensitivity. Demonstration of a superconducting circuit operating at clock rates in the tens of GHz is often hindered by the difficulty of high speed interfacing with room- temperature test equipment. In this work, a test chip with integrated acquisition memory is used to simplify high speed testing in a cryogenic environment. The small size (256 bits) of the on-chip memory severely limits the frequency resolution of spectra based on standard fast Fourier transforms. Higher resolution spectra are obtained by &ldquo;segmented correlation&rdquo;, a new method for testing ADCs. Two different techniques have been found for clocking the superconducting modulator at frequencies in the tens of GHz. In the first approach, an optical clocking technique was developed, in which picosecond laser pulses are delivered via optical fiber to an on-chip metal-semiconductor-metal (MSM) photodiode, whose output current pulses trigger the Josephson circuitry. In the second approach, the superconducting modulator is clocked by an on-chip Josephson oscillator. These testing methods have been applied in the successful demonstration of a superconducting bandpass &Delta;&Sigma; modulator fabricated in a niobium integrated circuit process with 1 kA/cm<super>2</super> critical current density for the Josephson junctions. At a 42.6 GHz sampling rate, the center frequency of the experimental modulator is 2.23 GHz, the measured SNR is 49 dB over a 20.8 MHz bandwidth, and a full-scale (FS) input is &minus;17.4 dBm. At a 40.2 GHz sampling rate, the measured in-band noise is &minus;57 dBFS over a 19.6 MHz bandwidth. (Abstract shortened by UMI.) SIS PROQUEST2004 SzGeCERN Electrical Engineering THESIS PROQUEST Engineering, Electronics And Electrical (0544) Lee, H K dir. n 200411 29 20080416 1657 CER01 20040311 PUBLIC 002437328CER DUMMY THESIS 463088 SzGeCERN 0612426181 9780612426184 PROQUEST MAI38/02p463Apr2000 PROQUEST MQ42618 2215884CERCER eng Frank, B M A Novel Common Gate Mixer For Wireless Applications Kingston, Ontario Queens Univ. 1999 72 p Not held by the CERN library MSc Queens Univ. 1999 In this thesis, a new mixer is presented that has been developed as part of an integrated receiver for wireless applications. It is a monolithic microwave integrated circuit (MMIC) single balanced FET mixer, implemented using common gate transistors to maximize the gain provided by the transistors at an operating frequency in excess of the process' short circuit unity current gain frequency (<italic>f_T</italic>) of 20 GHz. Most FET mixers (and amplifiers) use transistors in a common source (CS) configuration because of their large low frequency gain and stability. However, the CS configuration suffers a large conversion loss at high frequencies due to Miller effect, whereby the parasitic capacitance <italic>C_dg</italic> between the drain and gate produces feedback at high frequencies. The common gate (CG) configuration does not suffer from this problem, but does have stability concerns. For this mixer, a common gate configuration was used in a balanced structure, negating the Miller effect and minimizing the conversion loss of the structure while providing isolation between the local oscillator (LO) and radio frequency (RF) ports, and also maintaining stability. (Abstract shortened by UMI.) SIS PROQUEST2000 SzGeCERN Electrical Engineering THESIS PROQUEST Engineering, Electronics And Electrical (0544) Freundorfer, A P dir. n 200034 29 20071128 1312 CER01 20000922 PUBLIC 002215884CER DUMMY THESIS 607580 SzGeCERN 20130528220932.0 oai:cds.cern.ch:607580 cerncds:FULLTEXT CERCER 2366763 eng BUDKER-INP-2002-31 SIS-2003-137 Salikova, T V RF Control System of FEL is Based on EPICS 2002 Novosibirsk Budker Inst. Nucl. Phys. 2002 3 p CERN EDS SzGeCERN XX PREPRINT PREPRINT Kondakov, A A Kurkin, G Ya Tribendis, A G http://documents.cern.ch/cgi-bin/setlink?base=other&categ=sis&id=sis-2003-137 Access to fulltext document http://cds.cern.ch/record/607580/files/sis-2003-137.pdf Access to fulltext document http://cds.cern.ch/record/607580/files/sis-2003-137.ps.gz Access to fulltext document sis.prepteam@cern.ch n 200310 11 20060218 0016 CER01 20030305 PUBLIC 002366763CER PREPRINT 702787 SzGeCERN 20230217110819.0 oai:cds.cern.ch:702787 cerncds:FULLTEXT WAI01 000012005 eng CERN-AB-Note-2003-055-SPL AB-Note-2003-055-SPL Tückmantel, Joachim Proposal for Control of a Multi-Cavity RF System with One Transmitter 2003 Geneva CERN 05 Aug 2003 mult. p SIS ABNOTE2003 CLAS1 SzGeCERN Accelerators and Storage Rings CERN Multi-Cavity RF System CERN INTNOTE PUBLAB XX XX AB CERN. Geneva. AB Department SPL http://documents.cern.ch/cgi-bin/setlink?base=internal&categ=ab&id=ab-note-2003-055 Fulltext http://cds.cern.ch/record/702787/files/ab-note-2003-055.pdf Fulltext http://cds.cern.ch/record/702787/files/ab-note-2003-055.ps.gz Fulltext n 200350 12 20100830 0942 CER01 20031219 PUBLIC 000414739CER SLINTNOTE NOTE 609192 SzGeCERN 20121219034936.0 oai:cds.cern.ch:609192 cerncds:FULLTEXT eng DESY-TESLA-2003-16 TESLA-2003-16 TESLA-REPORT-2003-16 CM-P00041307 Burghardt, A FPGA based RF control 2003 Hamburg DESY May 2003 6 p SzGeCERN Accelerators and Storage Rings PREPRINT Simrock, S N TESLA Collaboration http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=CM-P&id=CM-P00041307 Fulltext http://cds.cern.ch/record/609192/files/cm-p00041307.pdf Fulltext h 200329 11 20061223 0014 CER01 20030318 PUBLIC 002368397CER PREPRINT 729097 SzGeCERN 20240223160902.0 eng Fong, K RF Control System for ISAC II Superconducting Cavity Test Stand 2002 POSTER SIS LINAC02-2004 SzGeCERN Accelerators and Storage Rings ARTICLE Laverty, M Fang, S https://accelconf.web.cern.ch/l02/PAPERS/TH445.PDF Published version TRIUMF n 200414 13 20051027 1933 CER01 20040406 578142 e-proc. TH445 gyeongju20020819 PUBLIC 002441848CER ARTICLE 584784 SzGeCERN 20240223160711.0 2343401CERCER eng Luong, M Minimizing RF Power Requirement and Improving Amplitude/Phase Control for High Gradient Superconducting Cavities 2002 Accelerator Technology SIS EPAC02-2002 SzGeCERN Accelerators and Storage Rings CERN feedback CERN superconducting-rf CERN rf-structure CERN klystron CERN acceleration ARTICLE CERN Superconducting RF Desmons, M Devanz, G Mosnier, A https://accelconf.web.cern.ch/e02/PAPERS/THPDO011.pdf Published version from JACoW michel.luong@cea.fr CEA, Gif-sur-Yvette n 200240 13 20070206 2033 CER01 20021004 492578 2265 paris20020603 PUBLIC 002343401CER ARTICLE 584756 SzGeCERN 20240223160710.0 2343372CERCER eng Martins, M N High-power RF Phase and Amplitude Control 2002 Accelerator Technology SIS EPAC02-2002 SzGeCERN Accelerators and Storage Rings CERN radio-frequency CERN microtron CERN controls ARTICLE CERN Room Temperature RF Figueredo, M Malafronte, A A Takahashi, J AUTHOR|(CDS)2075014 #BEARD# https://accelconf.web.cern.ch/e02/PAPERS/TUPLE114.pdf Published version from JACoW martins@if.usp.br IFUSP, Sao Paulo n 200240 13 20070206 2033 CER01 20021004 492578 2175 paris20020603 PUBLIC 002343372CER ARTICLE 453409 SzGeCERN 20170222221358.0 oai:cds.cern.ch:453409 cerncds:FULLTEXT CERCER 2205199 SLAC 4447263 SPIRES 4447263 Inspire 532039 physics/0008163 eng Wang, Y M Analysis and Synthesis of the SNS Superconducting RF Control System 2000 Los Alamos, NM Los Alamos Nat. Lab. The RF system for the SNS superconducting linac consists of a superconducting cavity, a klystron, and a low-level RF (LLRF) control system. For a proton linac like SNS, the field in each individual cavity needs to be controlled to meet the overall system requirements. The purpose of the LLRF control system is to maintain the RF cavity field to a desired magnitude and phase by controlling the klystron driver signal. The Lorentz force detuning causes the shift of the resonant frequency during the normal operation in the order of a few hundreds hertz. In order to compensate the Lorentz force detuning effects, the cavity is pre-tuned into the middle of the expected frequency shift caused by the Lorentz force detuning. Meanwhile, to reduce the overshoot in the transient response, a feed-forward algorithm, a linear parameter varying gain scheduling (LPV-GS) controller, is proposed to get away a repetitive noised caused by the pulsed operation as well as the Lorentz force detuning effects. LANL EDS SIS LANLPUBL2002 SIS LINAC00-2002 SIS:2002 PR/LKR added SzGeCERN Other Fields of Physics ARTICLE LANL EDS Accelerator Physics LANL EDS Instrumentation and Detectors LANL EDS Physics Kwon, S I Regan, A H http://documents.cern.ch/cgi-bin/setlink?base=preprint&categ=physics&id=0008163 Access to fulltext document http://www.slac.stanford.edu/econf/C000821/TUC16.shtml Published version from SLAC http://cds.cern.ch/record/453409/files/0008163.pdf Access to fulltext document http://cds.cern.ch/record/453409/files/0008163.ps.gz Access to fulltext document ymwang@lanl.gov n 200034 13 20100421 1409 CER01 20000821 423683 e-proc. TUC16 monterey20000821 PUBLIC 002205199CER ARTICLE ConferencePaper Hidden 453168 SzGeCERN 20170222221355.0 oai:cds.cern.ch:453168 cerncds:FULLTEXT CERCER 2204311 SLAC 4446658 SPIRES 4446658 Inspire 531979 physics/0008098 eng SLAC-PUB-8571 Corredoura, P L RF Control System for the NLC Linacs 2000 Stanford, CA SLAC 16 Aug 2000 3 p The proposed Next Linear Collider contains a large number of linac RF systems with new requirements for wideband klystron modulation and accurate RF vector detection. The system will be capable of automatically phasing each klystron and compensating for beam loading effects. Accelerator structure alignment is determined by detection of the beam induced dipole modes with a receiver similar to that used for measuring the accelerator RF and is incorporated into the RF system topology. This paper describes the proposed system design, signal processing techniques and includes preliminary test results. LANL EDS SIS LANLPUBL2002 SIS LINAC00-2002 SIS:2002 PR/LKR added SzGeCERN Other Fields of Physics ARTICLE LANL EDS Accelerator Physics LANL EDS Instrumentation and Detectors LANL EDS Physics Adolphsen, C E http://documents.cern.ch/cgi-bin/setlink?base=preprint&categ=physics&id=0008098 Access to fulltext document http://www.slac.stanford.edu/econf/C000821/TUC18.shtml Published version from SLAC http://cds.cern.ch/record/453168/files/0008098.pdf Access to fulltext document http://cds.cern.ch/record/453168/files/0008098.ps.gz Access to fulltext document plc@slac.stanford.edu n 200033 13 20100421 1409 CER01 20000818 423683 e-proc. TUC18 monterey20000821 PUBLIC 002204311CER ARTICLE ConferencePaper Hidden