Mr
James Rose
(Brookhaven)
08/05/2012, 09:30
Oral
The NSLS-II is a third generation 3 GeV light source designed for 500mA of circulating current and up to 1.2 MW of installed RF power. The RF systems consist of a 200 MeV S-band pulsed LINAC, 90 kW IOT based transmitter powering a 7 cell cavity for the booster and up to four 500 MHz SRF systems and two 1500MHz SRF passive cavities in the storage ring distributed equally in two RF straight...
Richard Nelson
(Jefferson Lab)
08/05/2012, 11:00
Oral
Eighty RF positions are being added to the existing 340 as part of an energy doubling upgrade at Jefferson Lab. Built around a newly designed and higher efficiency 13 kW klystron developed for JLab by L-3 Communications, each new RF chain is completely revamped because of increased power capabilities, yet needed to fit into an existing footprint. This paper will discuss the main components of...
Cristina Pasotti
(Sincrotrone Triest S.C.p.A.)
08/05/2012, 11:30
Oral
A review of the ELETTRA Storage Ring and Full Energy Injector 500 MHz RF power plants ( klystron and IOT sources) is described as well as their performances and maintenance procedure. An introduction on RF power projects and future installations is given
Morten Jensen
(D)
08/05/2012, 12:00
Oral
We present here a selection of results and some of the major upgrades specific to the high power amplifiers.
Mr
Abdallah Hamdi
(CEA/Saclay)
08/05/2012, 13:30
Oral
The IPHI (High Intensity Proton Injector) is a facility developed at CEA/Saclay in collaboration with CERN and IN2P3. The final step of this Low Energy accelerator prototype designed to accelerate beams up to 100 mA with energy up to 3 MeV is in progress. An overview of the main components is given, the RF source is described and last RF measurements are shown.
Mark E. Middendorf
(Argonne National Laboratory)
08/05/2012, 14:00
Oral
The original vacuum-tube-based rf power amplifiers (four online, two spare) that drove the four rebunching cavities on the Spallation Neutron Source (SNS) Medium Energy Beam Transport (MEBT) structure have been replaced with commercially available 25-kW solid state amplifiers (4 online, one spare). A 4+1 switch matrix permits remote switching of the spare amplifier into any one of the four...
Dr
Rutambhara Yogi
(Uppsala University, Sweden)
08/05/2012, 14:30
European Spallation Source (ESS) is one of the world’s most powerful neutron sources. The ESS linac will accelerate 50mA of protons to 2.5GeV in 2.86ms long pulses at a repetition rate of 14 Hz. It produces beam with 5MW average power and 125MW peak power. There are 36 superconducting spoke resonators, which provide a power of 0.5MW to the beam.
FREIA (Facility for Research...
Mr
Douglas Horan
(Argonne National Laboratory)
08/05/2012, 15:00
Oral
The Advanced Photon Source (APS) booster and storage ring rf systems utilize 352-MHz, 1.2 MW klystrons as final rf amplifier devices. After seventeen years of APS operation, optimized system designs and detailed preventative maintenance activities have resulted in rf system reliability statistics that have exceeded the wildest expectations hoped for at the start of APS operations. How we...
David McGinnis
(European Spallation Source)
08/05/2012, 16:00
Oral
The European Spallation Source Linac reaches an energy of 2.5GeV within 350 meters. The linac delivers an average power of 5 MW with a 4% duty factor (2.9 mSec pulse at a rate of 14Hz). The peak power of the linac is over 123 MW. This averages to a peak power density that must be supplied to the beam of over 350kW/meter. Because of the large power density, 98% of the linac consists of...
Jean-Maurice Mercier
(ESRF)
08/05/2012, 16:30
Oral
The operation performance of the ESRF RF system will be presented, followed by a detailed report on the procurement, installation, test and commissioning of four 150 kW solid state amplifiers on the booster.
Jonathan Stampe
(C)
08/05/2012, 17:00
Oral
The Canadian Light Source is a third generation 2.9 GeV synchrotron light source which has been operational since 2003. This talk will discuss the booster ring and storage ring RF system architecture, performance, reliability and improvements made since commissioning.
Markus Schneider
(Paul Scherrer Institut)
08/05/2012, 17:30
Oral
At PSI, protons are accelerated up to an energy of 590 MeV by two separated sector cyclotrons, the Injector 2 and the Ring. Since 2008 the Ring cyclotron is running with 4 copper cavities. By increasing the cavity voltage to 850 kVp the number of turns was reduced and the beam current is increased up to 2.4 mA, which results in a beam power of 1.4 MW.
In 2010 the regular operation suffered...
Mr
Yicih (Dave) Zhang
(Freescale Semiconductors)
09/05/2012, 08:45
This presentation will cover Freescale high power RF amplifiers using LDMOS technology, and some its advantage it brings over traditional technologies. It will also cover topics regarding design support, thermal characterization and ruggedness/reliability. Presentation will conclude with an outlook on future trends of LDMOS RF amplifiers.
Jean-Paul ABADIE
(ELTA-AREVA)
09/05/2012, 10:00
In the frame of ESRF Booster Upgrade, ELTA-AREVA has designed and provided four 150kW Amplifier at 352 MHz, based on Solid State Amplifier technology.
The presentation describes main features and performances of the 150 kW SSA that have been qualified on fictive terminations and have been recently connected to Booster cavities.
The SSA is based on 650W LDMOS Power Amplifier Modules,...
Dr
Hartmut Büttig
(Helmholtz Zentrum Dresden-Rossendorf)
09/05/2012, 11:00
Oral
With the expansion of the radiation source ELBE, a centre for high power radiation sources is being built between 2009 and 2014 at the Helmholtz Zentrum Dresden Rossendorf. One part of this program is to increase the beam current of the ELBE LINAC. In January 2012 each of the 10kW CW klystrons used to operate the superconducting cavities of ELBE since 2001 had been replaced by a pair of 10kW...
Dr
Jorn Jacob
(ESRF)
09/05/2012, 11:30
Oral
The ESRF has ordered seven 150 kW solid state amplifiers (SSA) from ELTA. In parallel, the ESRF has started an R&D program for mroe compact and less costly SSA using planar balun circuits and cavity combiners. The status of the project will be reported.
* This work receives supported from the EU in the framework of the FP7/ESFRI/CRISP program.
Ti Ruan
(Synchrotron SOLEIL)
09/05/2012, 12:00
Oral
At SOLEIL, 5 Solid State Amplifiers (SSA) are providing the required 352 MHz CW power : 1 x 35 kW in the Booster (BO) cavity and 4 x 180 kW on the 4 superconducting cavities of the Storage Ring (SR). Based on a design fully developed in house, they consist in a combination of a large number of 320 W elementary modules (1 x 147 in the BO and 4 x 724 in the SR) with MOSFET transistors,...
Edward L. Eisen
(CPI, Palo Alto)
10/05/2012, 08:00
The Inductive Output Tube (IOT) has played a major role in in the broadcast television industry for many years, due to the IOTs improved efficiency, linearity and reduced footprint compared to the klystron. In the past decade this electron device has found expanded use in both RF accelerator systems and military defense applications. The IOT can provide continuous wave power up to hundreds of...
Michael Boyle
(L-3 Communications Electron Devices)
10/05/2012, 08:45
L-3 Communications Electron Devices has developed a 90 kW CW 500 MHz IOT for the BNL NSLS-II Booster RF Transmitter System. L-3 has been manufacturing IOTs for use in UHF terrestrial broadcast applications since 1998. Details regarding design modifications to our standard broadcast IOT along with performance data will be presented.
Morten Jensen
(D)
10/05/2012, 10:00
Diamond currently operates its storage ring with two high power IOT based amplifiers. Each amplifier combines the output of up to four 80 kW IOTs. We present here the outline design of the amplifier and operational parameters.
Kenneth Baptiste
(Lawrence Berkeley National Laboratory)
10/05/2012, 11:00
Oral
I will present the the issues that we encountered and ultimately overcame while testing and commissioning our new 300kW class klystron. Issues such as unexpected mod-anode PS ripple frequencies, HV electro-static shielding, correct biasing of the mod-anode electrode during a fast HV fault, HV turn-on transients, filament resistance changes, etc.
Mr
Wolfgang Tron
(Paul Scherrer Institut)
10/05/2012, 11:30
Oral
Last year we celebrated the 10th anniversary of commissioning the Swiss Light Source. The heaters of all klystrons collected about 255’000 hours during this time and the overall operation was extremely successful. Nevertheless several issues, like reinforcing the HV cabinet, coincident arc detection and cooling air interlock had to be improved. These klystrons are not any longer produced by...
Andre Spichiger
(T)
10/05/2012, 13:30
Oral
Short circuit energy considerations using the example of a pulse step modulator based HVPS.
Mr
Slawomir Kwiatkowski
(LBNL)
10/05/2012, 14:30
Oral
The new ALS Main Ring 500MHz RF system will require significant modification of the existing HV power supply in which classical ignitron based crow-bar system will be replaced with house made solid state disconnect switch which is undergoing final high power test. The principle of the operation and the status of the testing will be presented.
Eric Montesinos
(CERN)
10/05/2012, 16:00
Oral
Recent fundamental power coupler designs and tests for various projects such as SPL, Linac4, ESRF, SOLEIL, APS, HIE-Isolde.
Dr
Wencan Xu
(Brookhaven National Lab)
10/05/2012, 16:30
Oral
BNL 704MHz SRF gun for ERL uses two high power fundamental power couplers (FPCs) to deliever 1MW CW RF power to gun cavity. Prior to install the FPCs to the cavity, we used the 1MW klystron to condition the two couplers. This paper will address design of the high power couplers, conditioning test of the FPCs. Multipacting simulation using Track3P and comparison with conditioning will be...
Gian Trento
(Argonne National Laboratory)
10/05/2012, 17:00
Oral
The APS 352MHz radio frequency test stand (RFTS) was constructed in 2002 primarily to test and condition storage ring and booster rf cavity components. Since the rf test stand’s inception, modifications have been made to increase the RFTS’s testing capabilities. These modifications include: the installation of a solid state switch / mod-anode regulator, a high-voltage switch tank, access to...
Dr
Shigeki Sasaki
(SPring-8/JASRI)
10/05/2012, 17:30
Oral
We have developed a cavity specifically used for the coupler conditioning. For the booster synchrotron, 5-cell cavities are used and maximum 300-kW RF power must be fed through the couplers, whereas for the storage ring single cell cavities are used and the power fed through the coupler is 150 kW at maximum. Each coupler should be conditioned before the installation to the actual machine. We...
Dr
Yoon Kang
(Oak Ridge National Laboratory)
11/05/2012, 08:00
Oral
A four-way waveguide RF power distribution system for testing the SNS multi-cavity cryomodule to investigate the collective behavior has been developed. A single klystron operating at 805MHz in 60Hz 8% duty cycle powers the 4-way waveguide splitter to deliver up to 600 kW to Individual cavities. Each cavity is fed through a waveguide vector modulator at each splitter output with magnitude and...
Dr
Nikolai Schwerg
(CERN)
11/05/2012, 08:30
Oral
The low-level RF system for LHC and Linac4 relies on the accurate readings of waveguide directional couplers as well as the cavity antenna measurements. A good calibration of both is crucial for an effective regulation.
We briefly revise the working principle of waveguide directional couplers and illustrate the coupler calibration process. Inevitable standing waves in the calibration setup...
Dr
Daniel Valuch
(CERN)
11/05/2012, 09:00
Oral
During operation, the LHC high power RF equipment has to be protected from damage caused by electromagnetic discharges (arcs). The LHC waveguide arc detector system is based on the optical detection of the discharge through small apertures in the waveguide walls, optical fibres and very sensitive photo detectors.
Experience shows that some of the currently used optical fibres suffer from...
Dr
Alessandro Fabris
(Sincrotrone Trieste)
11/05/2012, 09:30
Oral
FERMI@Elettra is a single-pass linac-based FEL user-facility covering the wavelength range from 100 nm (12 eV) to 4 nm (310 eV) and is located next to the third generation synchrotron radiation facility Elettra in Trieste, Italy. The machine is presently under commissioning and the first FEL line (FEL-1) will be opened to the users by the end of 2012. The 1.5 GeV linac is based on S-band...
