It is obvious for the linear collider community that e+e− linear colliders (LC) are crucially important to explore the physics beyond the Standard Model and so we need at least one as soon as possible. The LHC may explore the physics beyond the Standard Model, but there are several experimental evidences that the important new physics is just around the corner and it is much easier to study it at the first phase e+e− linear colliders. Although LC machine designs are quite different from region to region, large part of detector design and physics issue are common to LC different machines. Therefore frequent and intensive information exchanges over the regions are needed, and also possible inter-regional cooperations are encouraged.
{"title":"Charge to participants","authors":"S. Komamiya","doi":"10.1063/1.1394295","DOIUrl":"https://doi.org/10.1063/1.1394295","url":null,"abstract":"It is obvious for the linear collider community that e+e− linear colliders (LC) are crucially important to explore the physics beyond the Standard Model and so we need at least one as soon as possible. The LHC may explore the physics beyond the Standard Model, but there are several experimental evidences that the important new physics is just around the corner and it is much easier to study it at the first phase e+e− linear colliders. Although LC machine designs are quite different from region to region, large part of detector design and physics issue are common to LC different machines. Therefore frequent and intensive information exchanges over the regions are needed, and also possible inter-regional cooperations are encouraged.","PeriodicalId":325505,"journal":{"name":"Physics and experiments with future linear e+ e- colliders","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125136439","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A detailed design of the low angle region of the TESLA detector has been developed. Fast and radiation hard sampling calorimeters provide instrumentation down to θ=4.6 mrad for physics and luminosity monitoring. Beam induced background sources, especially beamstrahlung pairs, hadronic background, neutrons, synchrotron radiation, beam gas induced background and muons have been studied. All background rates in the detector are at tolerable levels.
{"title":"Mask design and background studies for TESLA","authors":"K. Büsser","doi":"10.1063/1.1394408","DOIUrl":"https://doi.org/10.1063/1.1394408","url":null,"abstract":"A detailed design of the low angle region of the TESLA detector has been developed. Fast and radiation hard sampling calorimeters provide instrumentation down to θ=4.6 mrad for physics and luminosity monitoring. Beam induced background sources, especially beamstrahlung pairs, hadronic background, neutrons, synchrotron radiation, beam gas induced background and muons have been studied. All background rates in the detector are at tolerable levels.","PeriodicalId":325505,"journal":{"name":"Physics and experiments with future linear e+ e- colliders","volume":"81 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124883318","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
J. Gronberg, S. Hertzbach, L. Keller, T. Markiewicz, T. Maruyama
The design of the final focus system has been modified since the previous LC workshop in Sitges. The system has a reduced length and the front face of the final focusing quadrupole has been moved back to 4.3 meters from the interaction point. We report the effect of these changes on detector backgrounds.
{"title":"NLC interaction region layout and background estimates","authors":"J. Gronberg, S. Hertzbach, L. Keller, T. Markiewicz, T. Maruyama","doi":"10.1063/1.1394411","DOIUrl":"https://doi.org/10.1063/1.1394411","url":null,"abstract":"The design of the final focus system has been modified since the previous LC workshop in Sitges. The system has a reduced length and the front face of the final focusing quadrupole has been moved back to 4.3 meters from the interaction point. We report the effect of these changes on detector backgrounds.","PeriodicalId":325505,"journal":{"name":"Physics and experiments with future linear e+ e- colliders","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134357260","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The TESLA QCD program highlights are described.The TESLA QCD program highlights are described.
介绍了特斯拉QCD计划的亮点。介绍了特斯拉QCD计划的亮点。
{"title":"QCD Highlights from the TESLA TDR","authors":"P. Burrows, Ecfa, Desy Study Groups","doi":"10.1063/1.1394350","DOIUrl":"https://doi.org/10.1063/1.1394350","url":null,"abstract":"The TESLA QCD program highlights are described.The TESLA QCD program highlights are described.","PeriodicalId":325505,"journal":{"name":"Physics and experiments with future linear e+ e- colliders","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134472152","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The next Linear Collider should provide the capability to measure with precision the Higgs branching ratios, constraining the models of electroweak symmetry breaking. The precision of a proposed CCD vertex detector is studied for 120 GeV/c2 and 140 GeV/c2 Higgs production at s=500 GeV.
{"title":"Higgs branching ratio measurements at a future Linear Collider","authors":"J. Brau, C. Potter, M. Iwasaki","doi":"10.1063/1.1394322","DOIUrl":"https://doi.org/10.1063/1.1394322","url":null,"abstract":"The next Linear Collider should provide the capability to measure with precision the Higgs branching ratios, constraining the models of electroweak symmetry breaking. The precision of a proposed CCD vertex detector is studied for 120 GeV/c2 and 140 GeV/c2 Higgs production at s=500 GeV.","PeriodicalId":325505,"journal":{"name":"Physics and experiments with future linear e+ e- colliders","volume":"77 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128198738","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The TESLA detector asks for a strong and very homogeneous magnetic field within its useful volume. In this respect, a large superconducting magnet has been designed, with special attention to get the requested field homogeneity. The design of the magnet, a superconducting solenoid with its iron yoke, is described in this paper, with some emphasis on the achievement of the field homogeneity.
{"title":"TESLA detector magnet design","authors":"F. Kircher, B. Gastineau, V. Klioukhine, Y. Pabot","doi":"10.1063/1.1394441","DOIUrl":"https://doi.org/10.1063/1.1394441","url":null,"abstract":"The TESLA detector asks for a strong and very homogeneous magnetic field within its useful volume. In this respect, a large superconducting magnet has been designed, with special attention to get the requested field homogeneity. The design of the magnet, a superconducting solenoid with its iron yoke, is described in this paper, with some emphasis on the achievement of the field homogeneity.","PeriodicalId":325505,"journal":{"name":"Physics and experiments with future linear e+ e- colliders","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128384493","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Free electron lasers are now being designed which will operate at wavelengths down to about 1. [1] The physics of the high-gain, single pass FEL process requires extremely bright electron pulses in the 10–20 GeV range. This electron brightness should be achievable using an RF-photocathode source and a linear accelerator, such as the initial acceleration stage of a TeV-range linear electron-positron collider. The x-ray FEL radiation produced will have unique properties. In particular: • The FEL peak intensity and peak brightness will be many orders of magnitude higher than can be produced by any other source. • The pulse length will be less than 1 picosecond, orders of magnitude shorter than can be achieved with any other bright source such as a synchrotron. • The FEL radiation will have full transverse coherence and a degeneracy parameter (photons/coherence volume) equal to 109 or more. No other source can produce hard x-radiation with a degeneracy parameter significantly greater than 1. These properties ...
{"title":"X-ray free-electron lasers: Scientific goals and machine implications","authors":"J. Arthur","doi":"10.1063/1.1394304","DOIUrl":"https://doi.org/10.1063/1.1394304","url":null,"abstract":"Free electron lasers are now being designed which will operate at wavelengths down to about 1. [1] The physics of the high-gain, single pass FEL process requires extremely bright electron pulses in the 10–20 GeV range. This electron brightness should be achievable using an RF-photocathode source and a linear accelerator, such as the initial acceleration stage of a TeV-range linear electron-positron collider. The x-ray FEL radiation produced will have unique properties. In particular: • The FEL peak intensity and peak brightness will be many orders of magnitude higher than can be produced by any other source. • The pulse length will be less than 1 picosecond, orders of magnitude shorter than can be achieved with any other bright source such as a synchrotron. • The FEL radiation will have full transverse coherence and a degeneracy parameter (photons/coherence volume) equal to 109 or more. No other source can produce hard x-radiation with a degeneracy parameter significantly greater than 1. These properties ...","PeriodicalId":325505,"journal":{"name":"Physics and experiments with future linear e+ e- colliders","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129199219","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The CLIC study of a high energy (0.5–5 TeV), high luminosity (1034–1035 cm−2 sec−1) e± linear collider is presented. Beam acceleration using high frequency (30 GHz) normal-conducting structures operating at high accelerating fields (150 MV/m) significantly reduces the length and, in consequence, the cost of the linac. Based on new beam and linac parameters derived from a recently developed set of general scaling laws for linear colliders, the beam stability is shown to be similar to lower frequency designs in spite of the strong wake-field dependency on frequency. The drive beam generation scheme for RF power production by the so-called “Two Beam Acceleration (TBA)” method is described. It uses a thermionic gun and a fully-loaded normal-conducting linac operating at low frequency (937 MHz) to generate and accelerate the drive beam bunches, and RF multiplication by funnelling in compressor rings to produce the desired bunch structure. Recent 30 GHz hardware developments and results from the CLIC Test Facil...
{"title":"A multi-TeV compact e+e− linear collider","authors":"I. Wilson, C. S. Team","doi":"10.1063/1.1394300","DOIUrl":"https://doi.org/10.1063/1.1394300","url":null,"abstract":"The CLIC study of a high energy (0.5–5 TeV), high luminosity (1034–1035 cm−2 sec−1) e± linear collider is presented. Beam acceleration using high frequency (30 GHz) normal-conducting structures operating at high accelerating fields (150 MV/m) significantly reduces the length and, in consequence, the cost of the linac. Based on new beam and linac parameters derived from a recently developed set of general scaling laws for linear colliders, the beam stability is shown to be similar to lower frequency designs in spite of the strong wake-field dependency on frequency. The drive beam generation scheme for RF power production by the so-called “Two Beam Acceleration (TBA)” method is described. It uses a thermionic gun and a fully-loaded normal-conducting linac operating at low frequency (937 MHz) to generate and accelerate the drive beam bunches, and RF multiplication by funnelling in compressor rings to produce the desired bunch structure. Recent 30 GHz hardware developments and results from the CLIC Test Facil...","PeriodicalId":325505,"journal":{"name":"Physics and experiments with future linear e+ e- colliders","volume":"54 17","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120819286","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
We present an investigation of the use of net charge and kaon identification to tag the flavor of neutral B mesons. The net charge of the neutral B meson decay products is zero if all charged particles are used and slightly non-zero if only undiscriminated hadronic final states are used. The net charge of the kaons alone correctly tags the identity of the neutral meson in at least a third of all decays. We have parametrized the particle identification capability of several techniques, such as dE/dx in time projection chambers, LEP/SLC ring-imaging chambers and an enhanced BaBar DIRC. Using these parametrisations we compare the relative tagging power of each technique to that of an ideal detector.
{"title":"Neutral B meson flavor tagging","authors":"R. Wilson","doi":"10.1063/1.1394447","DOIUrl":"https://doi.org/10.1063/1.1394447","url":null,"abstract":"We present an investigation of the use of net charge and kaon identification to tag the flavor of neutral B mesons. The net charge of the neutral B meson decay products is zero if all charged particles are used and slightly non-zero if only undiscriminated hadronic final states are used. The net charge of the kaons alone correctly tags the identity of the neutral meson in at least a third of all decays. We have parametrized the particle identification capability of several techniques, such as dE/dx in time projection chambers, LEP/SLC ring-imaging chambers and an enhanced BaBar DIRC. Using these parametrisations we compare the relative tagging power of each technique to that of an ideal detector.","PeriodicalId":325505,"journal":{"name":"Physics and experiments with future linear e+ e- colliders","volume":"86 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122898886","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
We review the current design of the interaction region of the TESLA superconducting linear collider. We describe in particular the recent upgrades of the collimation section and the beam extraction lines.
本文综述了超导直线对撞机相互作用区域的设计现状。我们特别描述了最近对准直部分和光束提取线的升级。
{"title":"TESLA interaction region layout, collimation and extraction","authors":"O. Napoly, N. Walker","doi":"10.1063/1.1394407","DOIUrl":"https://doi.org/10.1063/1.1394407","url":null,"abstract":"We review the current design of the interaction region of the TESLA superconducting linear collider. We describe in particular the recent upgrades of the collimation section and the beam extraction lines.","PeriodicalId":325505,"journal":{"name":"Physics and experiments with future linear e+ e- colliders","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114962945","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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