| Paper | Title | Other Keywords | Page | ||||
|---|---|---|---|---|---|---|---|
| TUPMA088 | High Power RF Testing of a Cell Coupled Drift Tube LINAC Prototype for LINAC4 | coupling, linac, klystron, vacuum | 232 | ||||
|
A Cell-Coupled Drift Tube Linac (CCDTL) accelerating structure at 352 MHz has been selected for the energy range 40 to 90 MeV of Linac4, a new injector linac for the CERN accelerator complex. With regard to a conventional DTL in this energy range this structure presents the advantages of lower construction cost and easier access, cooling and alignment of the focusing quadrupoles placed between tanks. A full-scale high-power prototype of about 1/3 of a complete module has been designed and built at CERN. It is fed by a waveguide input coupler of novel conception. This paper summarizes the main mechanical features of the prototype and reports the results of low-power and high-power RF testing.
|
|
|
||||
| TUPMA093 | Thermo-structural Analysis of 400 KeV Deuteron RFQ Components | rfq, vacuum, linac, beam-transport | 235 | ||||
|
BARC is developing technologies for a high current low energy proton accelerator, which includes a 3MeV RFQ. As part of this, a 400 KeV prototype deuteron RFQ has been planned. This RFQ will also be utilized later to replace 14 MeV neutron generator at BARC. In this paper we are presenting Thermo-structural analysis of RFQ and features such as RF Coupler, Tuner, Vacuum port etc. This investigation will lead to design of local cooling schemes of these components. Parametric studies are also included in this paper. Feasible Cooling schemes which meet cooling requirements of components will also be discussed.
|
e-mail:piyushj@barc.gov.in |
|
||||
| TUPMA094 | Electron Cooling Rates in FNAL's Recycler Ring | electron, antiproton, emittance, instrumentation | 238 | ||||
|
A 0.1-0.5 A, 4.3 MeV DC electron beam provides cooling of 8 GeV antiprotons in Fermilab's Recycler storage ring. The paper presents cooling rate formulas derived in the framework of a simple non-magnetized model and compares them with measurements.
|
|
|
||||
| WEC3H102 | Fabrication and Performance Test of the Cavity BPM for KEK ATF2 and PAL XFEL | coupling, resonance, extraction, linear-collider | 336 | ||||
|
Precise, single shot measurement of the beam position with a sub-micrometer resolution is required for the next generation linear accelerators such as International Linear Collider (ILC) and X-ray Free Electron Laser (XFEL). As a pill-box cavity structure is sensitive to the transverse offset of the beam at the dipole-mode resonance, e.g., TM110-mode, a pill-box type cavity is a good candidate for the sub-micrometer beam position monitor (BPM). Test cavity BPM had been designed and tested in KEK successfully, and miscellaneous improvements for the final prototype fabrication and beam tests are performed in collaboration between KEK, SLAC and PAL. With the successful results of beam test in ATF, 41 cavity BPMs will be produced by PAL and installed in ATF2, which is an advanced beam-test line under construction as the extension of existing ATF for the beam studies on the final focus of the planned ILC program. Technical design considerations, fabrication and test results are described in this paper.
|
|
|
Slides
|
|
||
| WEPMA050 | BPM (Beam Position Monitor) in the PAL Linac and BTL | linac, feedback, electron, controls | 393 | ||||
|
In Aug. 2004, thirteen BPMs are installed at BTL (Beam Transport Line), and later in Aug. 2005, three BPM installed at main linac for beam trajectory measurement and feedback. BPMs for the BTL consist of 100mm strip-line electrodes in 150mm long chamber and uses SMA-R type feed-throughs. BPMs of the Linac consist of 57mm strip-line electrodes in 100mm short chamber and SMA-R type feed-throughs. 500MHz log-ratio signal processing circuits are used for the Linac and BTL BPM electronics. BPM data acquisition system is developed as an EPICS IOC by using NI S-series DAQ board and NI LabView 7.1. Best read-out accuracy of BPM system is measured as 20mm including BPM electronics. In this paper, we describe on the status of the BPM and its characteristics for PAL Linac and BTL.
|
|
|
||||
| WEPMA051 | Development of Wide Band FCT System for Booster Synchrotron of Indus-1 & 2 | booster, synchrotron, coupling, impedance | 396 | ||||
|
A high precision & non-destructive type of wide band FCT for the measurements of electron current has been developed. This monitoring system is composed of slow & fast FCTs, NiZnCo ferrite toroidal cores, pick up coils, electromagnetic shields & pulse amplifiers. A wide band FCT (rise time 60 ns & decay 1 ms) required for measurement of Electron beam intensity & turn-to-turn observation & stored current accumulation during 1 us pulse injection into Booster Synchrotron. Single FCT can't measure e beam current & turn-by-turn observation from 60 ns to 1 ms. Therefore, we designed & developed two FCTs housed in a single box. The spacing between them is optimized so that coupling between them will not affect pulse shape. The FCT consists of two NiZn ferrite ring cores separable into two pieces for easy setting around ceramic beam duct. A beam intensity of pulse (100 ns ~1 us) beam is monitored by fast rise Current monitor (~ 60 ns)& turn/stored currents monitored by slow FCT (~ 1 us to 1 ms). A wide band FCT showed fast rise & slow decay, high sensitivity (0.050V/mA), linearity within 1 % & good S/N ratio. This paper focuses on FCT designs, construction & their pulse response
|
|
|
||||
| THPMA010 | Structures of Quadrupole Magnet Core | quadrupole, controls, vacuum, magnet-design | 640 | ||||
|
In general, there are two different quadrupole core designs: two pieces (up half and low half cores) and four pieces (four quarter halves). Both structures work on those quadrupole magnets in different accelerators around the world. There is no certain rule about which design is good for what machine, it is most likely defends on the engineer’s favor and the coil size. There is advantage and disadvantage for both structures. However, the disadvantage of four pieces design is rather visible. It is the goal of this paper to study those advantages and disadvantages of two types of core structure from manufacturer’s point of view and the perturbations of the magnet field.
|
* Iron Dominated Electromagnets |
|