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805 Mhz And 201 Mhz Rf Cavity Development For Mucool
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Book Synopsis 805 MHz and 201 MHz RF Cavity Development for MUCOOL. by :
Download or read book 805 MHz and 201 MHz RF Cavity Development for MUCOOL. written by and published by . This book was released on 2002 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A muon cooling channel calls for very high acceleratinggradient RF structures to restore the energy lost by muons in theabsorbers. The RF structures have to be operated in a strong magneticfield and thus the use of superconducting RF cavities is excluded. Toachieve a high shunt impedance while maintaining a large enough apertureto accommodate a large transverse emittance muon beam, the cavity designadopted is a pillbox-like geometry with thin Be foils to terminate theelectromagnetic field at the cavity iris. The possibility of using gridsof thin-walled metallic tubes for the termination is also being explored. Many of the RF-related issues for muon cooling channels are being studiedboth theoretically and experimentally using an 805 MHz cavity that has apillbox-like geometry with thin Be windows to terminate the cavityaperture. The design and performance of this cavity are reported here. High-power RF tests of the 805 MHz cavity are in progress at Lab G inFermilab. The cavity has exceeded its design gradient of 30 MV/m, reaching 34 MV/m without external magnetic field. No surface damage wasobserved at this gradient. The cavity is currently under conditioning atLab G with an external magnetic field of 2.5 T. We also present here a201 MHz cavity design for muoncooling channels. The proposed cavitydesign is also suitable for use in a proof-of-principle Muon IonizationCooling Experiment (MICE).
Download or read book The MUCOOL RF Program written by D. Li and published by . This book was released on 2006 with total page 3 pages. Available in PDF, EPUB and Kindle. Book excerpt: Efficient muon cooling requires high RF gradients in the presence of high (3T) solenoidal fields. The Muon Ionization Cooling Experiment (MICE) also requires that the x-ray production from these cavities is low, in order to minimize backgrounds in the particle detectors that must be located near the cavities. These cavities require thin Be windows to ensure the highest fields on the beam axis. In order to develop these cavities, the MUCOOL RF Program was started about 6 years ago. Initial measurements were made on a six-cell cavity and a single-cell pillbox, both operating at 805 MHz. We have now begun measurements of a 201 MHz pillbox cavity. This program has led to new techniques to look at dark currents, a new model for breakdown and a general model of cavity performance based on surface damage. The experimental program includes studies of thin Be windows, conditioning, dark current production from different materials, magnetic-field effects and breakdown.
Book Synopsis Neutrino Factories, Superbeams and Betabeams by : Osamu Yasuda
Download or read book Neutrino Factories, Superbeams and Betabeams written by Osamu Yasuda and published by American Institute of Physics. This book was released on 2008-02-28 with total page 416 pages. Available in PDF, EPUB and Kindle. Book excerpt: The workshop has reviewed progress towards the future generation of neutrino oscillation experiments. These experiments will use very intense conventional neutrino beams and novel beams derived from muons or radioactive nuclei. These new facilities will provide a broad research front including muon physics and neutrino scattering experiments. The main technical challenges involve construction of very intense proton beams, targeting, effective capture of produced particles, cooling and ultra-fast acceleration of the resulting muons.
Book Synopsis XX International Symposium on Lepton and Photon Interactions at High Energies by : Juliet Lee-Franzini
Download or read book XX International Symposium on Lepton and Photon Interactions at High Energies written by Juliet Lee-Franzini and published by World Scientific. This book was released on 2002 with total page 672 pages. Available in PDF, EPUB and Kindle. Book excerpt: This important book covers topics that are of major interest to the high energy physics community, including the most recent results from flavour factories, dark matter and neutrino physics. In addition, it considers future high energy machines.
Book Synopsis A 201-MHz Normal Conducting RF Cavity for the International MICE Experiment by :
Download or read book A 201-MHz Normal Conducting RF Cavity for the International MICE Experiment written by and published by . This book was released on 2008 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: MICE is a demonstration experiment for the ionization cooling of muon beams. Eight RF cavities are proposed to be used in the MICE cooling channel. These cavities will be operated in a strong magnetic field; therefore, they must be normal conducting. The cavity design and construction are based on the successful experience and techniques developed for a 201-MHz prototype cavity for the US MUCOOL program. Taking advantage of a muon beamâ s penetration property, the cavity employs a pair of curved thin beryllium windows to terminate conventional beam irises and achieve higher cavity shunt impedance. The cavity resembles a round, closed pillbox cavity. Two half-shells spun from copper sheets are joined by e-beam welding to form the cavity body. There are four ports on the cavity equator for RF couplers, vacuum pumping and field probes. The ports are formed by means of an extruding technique.
Book Synopsis Lepton-photon 01 - Proceedings Of The Xx International Symposium On Lepton And Photon Interactions At High Energies by : Fabio Bossi
Download or read book Lepton-photon 01 - Proceedings Of The Xx International Symposium On Lepton And Photon Interactions At High Energies written by Fabio Bossi and published by World Scientific. This book was released on 2002-08-08 with total page 661 pages. Available in PDF, EPUB and Kindle. Book excerpt: This important book covers topics that are of major interest to the high energy physics community, including the most recent results from flavour factories, dark matter and neutrino physics. In addition, it considers future high energy machines.
Book Synopsis Neutrino 2002 by : Franz von Feilitzsch
Download or read book Neutrino 2002 written by Franz von Feilitzsch and published by . This book was released on 2002 with total page 582 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Neutrino written by and published by . This book was released on 2003 with total page 576 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Recent Progress of RF Cavity Study at Mucool Test Area by :
Download or read book Recent Progress of RF Cavity Study at Mucool Test Area written by and published by . This book was released on 2011 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt: Summar of presentation is: (1) MTA is a multi task working space to investigate RF cavities for R & D of muon beam cooling channel - (a) Intense 400 MeV H− beam, (b) Handle hydrogen (flammable) gas, (c) 5 Tesla SC solenoid magnet, (d) He cryogenic/recycling system; (2) Pillbox cavity has been refurbished to search better RF material - Beryllium button test will be happened soon; (3) E x B effect has been tested in a box cavity - Under study (result seems not to be desirable); (4) 201 MHz RF cavity with SRF cavity treatment has been tested at low magnetic field - (a) Observed some B field effect on maximum field gradient and (b) Further study is needed (large bore SC magnet will be delivered end of 2011); and (5) HPRF cavity beam test has started - (a) No RF breakdown observed and (b) Design a new HPRF cavity to investigate more plasma loading effect.
Download or read book Nuclear Physics written by and published by . This book was released on 2003 with total page 582 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Recent RF Results from the MuCool Test Area by :
Download or read book Recent RF Results from the MuCool Test Area written by and published by . This book was released on 2007 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The MuCool Experiment has been continuing to take data with805 and 201 MHz cavities in the MuCool Test Area. The system uses rfpower sources from the Fermilab Linac. Although the experimental programisprimarily aimed at the Muon Ionization Cooling Experiment (MICE), wehave been studying the dependence of rf limits on frequency, cavitymaterial, high magnetic fields, gas pressure, coatings, etc. with thegeneral aim of understanding the basic mechanisms involved. The 201 MHzcavity, essentially a prototype for the MICE experiment, was made usingcleaning techniques similar to those employed for superconductingcavities and operates at its design field with very littleconditioning.
Book Synopsis Multi-purpose 805 MHz Pillbox RF Cavity for Muon Acceleration Studies by :
Download or read book Multi-purpose 805 MHz Pillbox RF Cavity for Muon Acceleration Studies written by and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: An 805 MHz RF pillbox cavity has been designed and constructed to investigate potential muon beam acceleration and cooling techniques. The cavity can operate at vacuum or under pressure to 100 atmospheres, at room temperature or in a liquid nitrogen bath at 77 K. The cavity is designed for easy assembly and disassembly with bolted construction using aluminum seals. The surfaces of the end walls of the cavity can be replaced with different materials such as copper, aluminum, beryllium, or molybdenum, and with different geometries such as shaped windows or grid structures. Different surface treatments such as electro polished, high-pressure water cleaned, and atomic layer deposition are being considered for testing. The cavity has been designed to fit inside the 5-Tesla solenoid in the MuCool Test Area at Fermilab. Current status of the cavity prepared for initial conditioning and operation in the external magnetic field is discussed.
Book Synopsis High Power RF Test of an 805 MHz RF Cavity for a Muon Cooling Channel by :
Download or read book High Power RF Test of an 805 MHz RF Cavity for a Muon Cooling Channel written by and published by . This book was released on 2002 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt: We present recent high power RF test results on an 805 MHz cavity for a muon cooling experiment at Lab G in Fermilab. In order to achieve high accelerating gradient for large transverse emittance muon beams, the cavity design has adopted a pillbox like shape with 16 cm diameter beam iris covered by thin Be windows, which are demountable to allow for RF tests of different windows. The cavity body is made from copper with stiff stainless steel rings brazed to the cavity body for window attachments. View ports and RF probes are available for visual inspections of the surface of windows and cavity and measurement of the field gradient. Maximum of three thermo-couples can be attached to the windows for monitoring the temperature gradient on the windows caused by RF heating. The cavity was measured to have Q0 of about 15,000 with copper windows and coupling constant of 1.3 before final assembling. A 12 MW peak power klystron is available at Lab G in Fermilab for the high power test. The cavity and coupler designs were performed using the MAFIA code in the frequency and the time domain. Numerical simulation results and cold test measurements on the cavity and coupler will be presented for comparisons.
Book Synopsis Electromagnetic and Mechanical Design of Gridded Radio-frequency Cavity Windows by : Mohammad M. Alsharoa̕
Download or read book Electromagnetic and Mechanical Design of Gridded Radio-frequency Cavity Windows written by Mohammad M. Alsharoa̕ and published by . This book was released on 2004 with total page 158 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Muon Cooling RF R & D Program by : D. Li
Download or read book The Muon Cooling RF R & D Program written by D. Li and published by . This book was released on 2006 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Cooling muon beams in flight requires absorbers to reduce the muon momentum, accelerating fields to replace the lost momentum in the longitudinal direction, and static solenoidal magnetic fields to focus the muon beams. The process is most efficient if both the magnetic fields and accelerating fields are high and the rf frequency is low. We have conducted tests to determine the operating envelope of high-gradient accelerating cavities in strong static magnetic fields. These studies have already produced useful information on dark currents, magnetic fields and breakdown in cavities. In addition to continuing our program at 805 MHz, we are starting to test a 201 MHz cavity and are planning to look at a variety of appropriate geometries and materials. In parallel with these activities, we are supporting R & D on models and surface structure.
Book Synopsis A 201 MHz RF Cavity Design with Non-stressed Pre-curved Be Windows for Muon Cooling Channels by :
Download or read book A 201 MHz RF Cavity Design with Non-stressed Pre-curved Be Windows for Muon Cooling Channels written by and published by . This book was released on 2003 with total page 3 pages. Available in PDF, EPUB and Kindle. Book excerpt: We present a 201-MHz RF cavity design for muon cooling channels with non-stressed and pre-curved Be foils to terminate the beam apertures. The Be foils are necessary to improve the cavity shunt impedance with large beam apertures needed for accommodating large transverse size muon beams. Be is a low-Z material with good electrical and thermal properties. It presents an almost transparent window to muon beams, but terminates the RF cavity electro-magnetically. Previous designs use pre-stressed flat Be foils in order to keep cavity from detuning resulted from RF heating on the window surface. Be foils are expensive, and it is difficult to make them under desired tension. An alternative design is to use precurved and non-stressed Be foils where the buckling direction is known, and frequency shifts can be properly predicted. We will present mechanical simulations on the Be foils in this paper.
Book Synopsis Neutrino Factories and Superbeams by : Adam Para
Download or read book Neutrino Factories and Superbeams written by Adam Para and published by American Institute of Physics. This book was released on 2004-10-29 with total page 506 pages. Available in PDF, EPUB and Kindle. Book excerpt: The workshop has reviewed progress towards the future generation of neutrino oscillation experiments. These experiments will use very intense conventional neutrino beams and novel beams derived from muons or radioactive nuclei. These new facilities will provide a broad research front including muon physics and neutrino scattering experiments. The main technical challenges involve construction of very intense proton beams, targeting, effective capture of produced particles, cooling and subsequent acceleration of the resulting muons.
