Read Books Online and Download eBooks, EPub, PDF, Mobi, Kindle, Text Full Free.
Cold Mass Issues In The Mice Coupling Magnet
Download Cold Mass Issues In The Mice Coupling Magnet full books in PDF, epub, and Kindle. Read online Cold Mass Issues In The Mice Coupling Magnet ebook anywhere anytime directly on your device. Fast Download speed and no annoying ads. We cannot guarantee that every ebooks is available!
Book Synopsis Cold Mass Issues in the MICE Coupling Magnet by :
Download or read book Cold Mass Issues in the MICE Coupling Magnet written by and published by . This book was released on 2011 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt: I have identified two potential issues in the design of the attachments to the MICE coupling magnet cold mass. One of these attachment issues may extend into the cold mass. Both issues came to light during the analysis of what happened to the spectrometer solenoids. We must not make the same mistakes that were made on the spectrometer solenoids. The two questions that result from the identified issues are; 1) Are the superconducting low temperature superconducting leads between the coupling coil and the lower end of the high temperature superconducting (LTS) leads robust enough not quench and burn out? In the spectrometer solenoid one part of the LTS lead was not robust enough to prevent quenching and a burn out of the LTS lead and ; 2) Will there be problems with the quench protection resistors and diodes when the magnet quenches as a result of an HTS lead burning out or a disconnect of the magnet from its power supply? The second question is very important because the coupling coil has a large stored energy and inductance. As result, when current flows through the diodes and the resistors, both can be over heated. We observed resistor overheating in spectrometer magnet 2. This heating probably happened when the HTS lead the LTS lead burned out during the tests of magnet 2A and 2B respectively. (See MICE Note 324.) The answer to the first question is simple and straightforward. This is the issue that is primarily dealt with in MICE Note 324. If the resistance across the coil sub-divisions is high enough, the whole magnet will turn normal through quench-back. Making the resistance across a coil sub-division high enough is not simple.
Book Synopsis Design and Analyisi of a Self-centered Cold Mass Support for the MICE Coupling Magnet by :
Download or read book Design and Analyisi of a Self-centered Cold Mass Support for the MICE Coupling Magnet written by and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The Muon Ionization Cooling Experiment (MICE) consists of eighteen superconducting solenoid coils in seven modules, which are magnetically hooked together since there is no iron to shield the coils and the return flux. The RF coupling coil (RFCC) module consists of a superconducting coupling solenoid mounted around four conventional conducting 201.25 MHz closed RF cavities. The coupling coil will produce up to a 2.2 T magnetic field on the centerline to keep the beam within the RF cavities. The peak magnetic force on the coupling magnet from other magnets in MICE is up to 500 kN in longitudinal direction, which will be transferred to the base of the RF coupling coil (RFCC) module through a cold mass support system. A self-centered double-band cold mass support system with intermediate thermal interruption is applied to the coupling magnet, and the design is introduced in detail in this paper. The thermal and structural analysis on the cold mass support assembly has been carried out using ANSYS. The present design of the cold mass support can satisfy with the stringent requirements for the magnet center and axis azimuthal angle at 4.2 K and fully charged.
Book Synopsis Structural Design and Analysis for a Double-Band Cold Mass Support of the MICE Coupling Magnet by :
Download or read book Structural Design and Analysis for a Double-Band Cold Mass Support of the MICE Coupling Magnet written by and published by . This book was released on 2009 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The cooling channel of Muon Ionization Cooling Experiment (MICE) consists of eighteen superconducting solenoid coils, which are magnetically hooked together. A pair ofcoupling magnets operating at 4 K is applied to produce up to .6 T magnetic field on the magnet centerline to keep muon beam within the RF cavity windows. The peak magnetic force on the coupling magnet from other magnets in the MICE channel is up to 500 kN inlongitudinal direction, and the requirements for magnet center and axis azimuthal angle at 4 K are stringent. A self-centered double-band cold mass support system with intermediatethermal interruption is applied for the coupling magnet. The physical center of the magnet does not change as it is cooled down from 300 K to 4.2 K with this support system. In this paper the design parameters of the support system are discussed. The integral analysis of the support system using FEA method was carried out to etermine the tension forces in bands when various loads are applied. The magnet centre displacement and concentricity deviation form the axis of the warm bore are obtained, and the peak tension in support bands is also determined according to the simulation results.
Book Synopsis A Single-band Cold Mass Support System for the MICE Superconducting Coupling Magnet by :
Download or read book A Single-band Cold Mass Support System for the MICE Superconducting Coupling Magnet written by and published by . This book was released on 2008 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The cooling channel of the Muon Ionization Cooling Experiment (MICE) consists of eighteen superconducting solenoid coils, which are magnetically hooked together and contained in seven modules. The operations of a pair of MICE superconducting coupling magnets are affected directly by the other solenoid coils in the MICE channel. In order to meet the stringent requirement for the magnet center and axis azimuthal angle at 4.2 K, a self-centered tension-band cold mass support system with intermediate thermal interruption was applied for the MICE superconducting coupling magnet. The physical center of the magnet does not change as it is cooled down from 300 K to 4.2 K using this support system. This paper analyzed and calculated force loads on the coupling magnet under various operation modes of the MICE cooling channel. The performance parameters of a single-band cold mass support system were calculated also.
Book Synopsis Lessons Learned for the MICE Coupling Solenoid from the MICE Spectrometer Solenoids by :
Download or read book Lessons Learned for the MICE Coupling Solenoid from the MICE Spectrometer Solenoids written by and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Tests of the spectrometer solenoids have taught us some important lessons. The spectrometer magnet lessons learned fall into two broad categories that involve the two stages of the coolers that are used to cool the magnets. On the first spectrometer magnet, the problems were centered on the connection of the cooler 2nd-stage to the magnet cold mass. On the first test of the second spectrometer magnet, the problems were centered on the cooler 1st-stage temperature and its effect on the operation of the HTS leads. The second time the second spectrometer magnet was tested; the cooling to the cold mass was still not adequate. The cryogenic designs of the MICE and MuCOOL coupling magnets are quite different, but the lessons learned from the tests of the spectrometer magnets have affected the design of the coupling magnets.
Book Synopsis AC Loss Analysis on the Superconducting Coupling Magnet in MICE. by :
Download or read book AC Loss Analysis on the Superconducting Coupling Magnet in MICE. written by and published by . This book was released on 2008 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A pair of coupling solenoids is used in MICE experiment to generate magnetic field which keeps the muons within the iris of thin RF cavity windows. The coupling solenoids have a 1.5-meter inner diameter and will produce 7.4 T peak magnetic field. Three types of AC losses in coupling solenoid are discussed. The affect of AC losses on the temperature distribution within the cold mass during charging and rapid discharging process is analyzed also. The analysis result will be further confirmed by the experiment of the prototype solenoid for coupling solenoid, which will be designed, fabricated and tested at ICST.
Book Synopsis Magnetic and Cryogenic Design of the MICE Coupling Solenoid Magnet System by :
Download or read book Magnetic and Cryogenic Design of the MICE Coupling Solenoid Magnet System written by and published by . This book was released on 2008 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The Muon Ionization Cooling Experiment (MICE) will demonstrate ionization cooling in a short section of a realistic cooling channel using a muon beam at Rutherford Appleton Laboratory in the UK. The coupling magnet is a superconducting solenoid mounted around four 201MHz RF cavities, which produces magnetic field up to 2.6 T on the magnet centerline to keep muons within the iris of RF cavities windows. The coupling coil with inner radius of 750mm, length of 285mm and thickness of 102.5mm will be cooled by a pair of 1.5 W at 4.2 K small coolers. This paper will introduce the updated engineering design of the coupling magnet made by ICST in China. The detailed analyses on magnetic fields, stresses induced during the processes of winding, cool down and charging, and cold mass support assembly are presented as well.
Book Synopsis The Mechanical and Thermal Design for the MICE Coupling SolenoidMagnet by :
Download or read book The Mechanical and Thermal Design for the MICE Coupling SolenoidMagnet written by and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The MICE coupling solenoids surround the RF cavities that are used to increase the longitudinal momentum of the muon beam that is being cooled within MICE. The coupling solenoids will have a warm-bore diameter of 1394 mm. This is the warm bore that is around the 200 MHz RF cavities. The coupling solenoid is a single superconducting coil fabricated from a copper matrix Nb-Ti conductor originally designed for MRI magnets. A single coupling magnet is designed so that it can be cooled with a single 1.5 W (at 4.2 K) cooler. The MICE cooling channel has two of these solenoids, which will be hooked together in series, for a magnet circuit with a total stored-energy of the order of 12.8 MJ. Quench protection for the coupling coils is discussed. This report also presents the mechanical and thermal design parameters for this magnet, including the results of finite element calculations of mechanical forces and heat flow in the magnet cold mass.
Book Synopsis Structural Design and Thermal Analysis for Thermal Shields of the MICE Coupling Magnets by :
Download or read book Structural Design and Thermal Analysis for Thermal Shields of the MICE Coupling Magnets written by and published by . This book was released on 2009 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A superconducting coupling magnet made from copper matrix NbTi conductors operating at 4 K will be used in the Muon Ionization Cooling Experiment (MICE) to produce up to 2.6 T on the magnet centerline to keep the muon beam within the thin RF cavity indows. The coupling magnet is to be cooled by two cryocoolers with a total cooling capacity of 3 W at 4.2 K. In order to keep a certain operating temperature margin, the most important is to reduce the heat leakage imposed on cold surfaces of coil cold mass assembly. An ntermediate temperature shield system placed between the coupling coil and warm vacuum chamber is adopted. The shield system consists of upper neck shield, main shields, flexible connections and eight supports, which is to be cooled by the first stage cold heads of two ryocoolers with cooling capacity of 55 W at 60 K each. The maximum temperature difference on the shields should be less than 20 K, so the thermal analyses for the shields with different thicknesses, materials, flexible connections for shields' cooling and structure design for heir supports were carried out. 1100 Al is finally adopted and the maximum temperature difference is around 15 K with 4 mm shield thickness. The paper is to present detailed analyses on the shield system design.
Book Synopsis Issues in Electronics Research and Application: 2013 Edition by :
Download or read book Issues in Electronics Research and Application: 2013 Edition written by and published by ScholarlyEditions. This book was released on 2013-05-01 with total page 1177 pages. Available in PDF, EPUB and Kindle. Book excerpt: Issues in Electronics Research and Application: 2013 Edition is a ScholarlyEditions™ book that delivers timely, authoritative, and comprehensive information about Radar and Sonar Research. The editors have built Issues in Electronics Research and Application: 2013 Edition on the vast information databases of ScholarlyNews.™ You can expect the information about Radar and Sonar Research in this book to be deeper than what you can access anywhere else, as well as consistently reliable, authoritative, informed, and relevant. The content of Issues in Electronics Research and Application: 2013 Edition has been produced by the world’s leading scientists, engineers, analysts, research institutions, and companies. All of the content is from peer-reviewed sources, and all of it is written, assembled, and edited by the editors at ScholarlyEditions™ and available exclusively from us. You now have a source you can cite with authority, confidence, and credibility. More information is available at http://www.ScholarlyEditions.com/.
Book Synopsis The Physical Connection and Magnetic Coupling of the MICE CoolingChannel Magnets and the Magnet Forces for Various MICE OperatingModes by :
Download or read book The Physical Connection and Magnetic Coupling of the MICE CoolingChannel Magnets and the Magnet Forces for Various MICE OperatingModes written by and published by . This book was released on 2006 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A key issue in the construction of the MICE cooling channel is the magnetic forces between various elements in the cooling channel and the detector magnets. This report describes how the MICE cooling channel magnets are hooked to together so that the longitudinal magnetic forces within the cooling channel can be effectively connected to the base of the experiment. This report presents a magnetic force and stress analysis for the MICE cooling channel magnets, even when longitudinal magnetic forces as large as 700 kN (70 tons) are applied to the vacuum vessel of various magnets within the MICE channel. This report also shows that the detector magnets can be effectively separated from the central MICE cooling channel magnets without damage to either type of magnet component.
Book Synopsis Study on the Mechanical Instability of MICE Coupling Magnets by :
Download or read book Study on the Mechanical Instability of MICE Coupling Magnets written by and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The superconducting coupling solenoid magnet is one of the key equipment in the Muon Ionization Cooling Experiment (MICE). The coil has an inner radius of 750 mm, length of 281 mm and thickness of 104 mm at room temperature. The peak induction in the coil is about 7.3 T with a full current of 210 A. The mechanical disturbances which might cause the instability of the impregnated superconducting magnet involve the frictional motion between conductors and the cracking of impregnated materials. In this paper, the mechanical instability of the superconducting coupling magnet was studied. This paper presents the numerical calculation results of the minimum quench energy (MQE) of the coupling magnet, as well as the dissipated strain energy in the stress concentration region when the epoxy cracks and the frictional energy caused by 'stick-slip' of the conductor based on the bending theory of beam happens. Slip planes are used in the coupling coil and the frictional energy due to 'slow slip' at the interface of the slip planes was also investigated. The dissipated energy was compared with MQE, and the results show that the cracking of epoxy resin in the region of shear stress concentration is the main factor for premature quench of the coil.
Book Synopsis What Do We Do, If Some of the MICE Magnets Can't be Kept Cold Using the Two-stage Coolers?. by :
Download or read book What Do We Do, If Some of the MICE Magnets Can't be Kept Cold Using the Two-stage Coolers?. written by and published by . This book was released on 2011 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: Tests of the spectrometer solenoids have not been encouraging in terms of keeping the magnets cold using three 1.5 W (at 4.2 K) coolers. The spectrometer solenoids are being rebuilt with additional cooling capacity at 4.2 K. It is hoped that there will be sufficient 4.2 K cooling to keep the magnets cold. The spectrometer solenoids can be kept cold using liquid helium (up to a boil-off of 20 liters per day). This option does not apply for the other magnets in the MICE cooling channel, because there is not enough liquid helium storage within the magnet cold mass. It is important that the MICE collaboration ask the question, "How do we keep the MICE cooling channel magnets cold, if there isn't sufficient cooling from the 4.2 K coolers?" This report discusses the cooling requirements at both 40 K and 4.2 K for all three types of MICE cooling channel magnets. This report discusses the steps that must be taken in the magnet fabrication to permit the magnets to be cooled using a small (20 to 40 W) external 4.2 K Claude cycle refrigerator. One must also ask the question as to whether there is enough excess capacity in the decay solenoid refrigerator to cool some of the MICE magnets. A plan for cooling the magnets using a Linde 1400 series refrigerator is presented. A plan for increasing the 4.4 K refrigeration from the existing decay solenoid refrigerator is also presented.
Book Synopsis The Inductive Coupling of the Magnets in MICE and Its Effect OnQuench Protection by :
Download or read book The Inductive Coupling of the Magnets in MICE and Its Effect OnQuench Protection written by and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The inductive coupling between various MICE magnet circuits is described. The consequences of this coupling on magnet charging and quenching are discussed. Magnet quench protection is achieved through the use of quench-back. Calculations of the quenching of a magnet due to quench-back resulting from circulating currents induced in the magnet mandrel due to quenching of an adjacent magnet are discussed. This report describes how the MICE magnet channel will react when magnets in that channel are quenched.
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 A Frequency Response Study of Dipole Magnet Cold Mass for the Superconducting Super Collider by : K.K. Leung
Download or read book A Frequency Response Study of Dipole Magnet Cold Mass for the Superconducting Super Collider written by K.K. Leung and published by . This book was released on 1991 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Measurement of Resistance and Strength of Conductor Splices in the MICE Coupling Magnets by :
Download or read book Measurement of Resistance and Strength of Conductor Splices in the MICE Coupling Magnets written by and published by . This book was released on 2009 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The superconducting magnets for the Muon Ionization Cooling Experiment [1] (MICE) use a copper based Nb-Ti conductor with un-insulated dimensions of 0.95 by 1.60 mm. There may be as many as twelve splices in one MICE superconducting coupling coil. These splices are to be wound in the coil. The conductor splices produce Joule heating, which may cause the magnet to quench. A technique of making conductor splices was developed by ICST. Two types of 1-meter long of soldered lap-joints have been tested. Side-by-side splices and up-down one splices were studied theoretically and experimentally using two types of soft solder made of eutectic tin-lead solder and tin-silver solder. The resistances of the splices made by ICST were tested at LBNL at liquid helium temperatures over a range of magnetic fields up to 5 T. The breaking strength of 250 mm long splices was also measured at room temperature and liquid nitrogen temperature.
