The scale perpendicular to the beam direction has been greatly magnified compared to the scale in the beam direction. May 11, 2000 the pepii asymmetric electronpositron collider, which was completed in july 1998, has started delivering luminosity to the babar experiment at slac. Lostparticle backgrounds in pep ii are dominated by a combination of beamgas bremstrahlung, beamgas coulomb scattering. Since its opening in 1962, slac has been helping create the future. Slac national accelerator laboratory is one of 10 department of energy doe office of science laboratories.
Slac pub11691 simulation of pep ii accelerator backgrounds using turtle work supported by department of energy contract deac0276sf00515. Slac national accelerator laboratory stanford university. Pep stopped operating in 1990, and pepii began construction in 1994. He claimed that pepii would not only advance slacs hep program but also find. Slac national accelerator laboratory, originally named stanford linear accelerator center, is a united states department of energy national laboratory operated by stanford university under the programmatic direction of the u. The central hub for powerful electron beams at the department of energys slac national accelerator laboratory is getting a makeover to prepare for the installation of lcls ii. It has been 25 years since the inauguration of the detector collaboration for pep ii during the nov 30 dec 4, 1993 collaboration meeting number 1. Slac national accelerator laboratory 2575 sand hill road, menlo park, ca 94025 operated by stanford university for the u. The proposal for upgrading the existing pep collider at slac to enable the copious production of boosted b mesons is the result of several years of collaborative study by groups representing lbl, llnl, and slac. This paper summarizes the design issues of this novel accelerator complex, the pepii performance as achieved during the commissioning runs, and the early running experience with babar.
Founded, in 1962, as a singlemission us national laboratory for. Lostparticle backgrounds in pep ii are dominated by a combination of beamgas bremstrahlung, beamgas coulomb scattering, radiative. If you dont have a slac computer account, you can call us at slac x4357 help or offsite 650 9264357. Slac, a twomile particle accelerator jutting west from stanford university, pushes electrons near the speed of light. Slac laboratory, menlo park, california, united states. Ppt slac ilc accelerator program powerpoint presentation. Pep x is based on the development of an existing pep ii storage ring 2. The stanford linear accelerator center the stanford linear accelerator center slac is a national basic research laboratory devoted to experimental and theoretical research in elementary particle physics, to the development of new techniques in highenergy accelerators and elementary particle detectors, and to a broad program of research using synchrotron radiation. Quickset device manager, included as a free, optional expansion pack, provides additional device management, control, and versioning capabilities. Selfevaluation fy2006 contractor performance evaluation and measurement plan for management and operation of the stanford linear accelerator center volume 1, science and technology, goals 1. Linac coherent light source lcls slac national accelerator laboratory 2575 sand hill road ms103, menlo park, ca 94025 operated by stanford university for the u. The highenergy ring, which stores a 9gev electron beam, was an upgrade of the existing pep collider. Quickset device manager, included as a free, optional expansion pack, provides additional device management, control, and versioning.
Instead, pepii features beams that enter the interaction region at an angle, and a clever system of magnets bends. Simulation of pepii accelerator backgrounds using turtle. Pepii transverse feedback electronics upgrade unt digital. List of upcoming training events see column on right learner guides for employees, users and contractors. With the beginning of the operation of the bfactory, pep ii, the linac will. We pride ourselves on our research excellence and accomplishments, our quality of talent and opportunities to support our staff, as well as our role in exploring the new frontiers of science. We published 576 papers and counting on cp violation and many other things. Status report on the design of a detector for the study of. As a stanford university employee at slac, you are a member of the stanford community. Explore slac national accelerator laboratorys 2,596 photos on flickr. Our vision is to create an environment that fosters world leading accelerator science and technologies for future accelerators while enabling user research and accelerator. Pep was followed by the pep ii project, which included a set of two storage rings and operated from 19982008. The adobe flash plugin is needed to view this content. The reinvention of the slac national accelerator laboratory.
Please submit your it help requests by logging in to our servicenow portal with your slac computer account. Three next generation bfactories were to be built in the 2010s and 2020s. From 1999 to 2008, the main purpose of the linear accelerator was to inject electrons and positrons into the pep ii accelerator, an electronpositron collider with a pair of storage rings 2. The pep ii b factory at the stanford linear accelerator center slac requires an upgrade of the transverse feedback system electronics. The advantages of submitting your request via our servicenow portal are. This milestone in achievement enabled practical high gradient acceleration and led to the creation of slac, scheitrum said. An exemplar of postworld war ii big science, slac was founded in 1962 and is run by stanford university for the u. Jul 25, 2008 pep ii and babar have just finished run 7, the last run of the slac bfactory. Slacpub11691 simulation of pepii accelerator backgrounds using turtle work supported by department of energy contract deac0276sf00515. January 5, 2011 erik jongewaard kmd and xband overview. The pepii facility consists of two independent storage rings, one located atop the other in the pep tunnel. Citeseerx slacpub11691 simulation of pepii accelerator. Download a variety of fact sheets to learn more about slac, our programs and latest scientific discoveries. The slac national accelerator laboratory formerly stanford linear accelerator center is a dualmission united states national laboratory for particle physicsparticle astrophysics and photon science.
Users may download and print one copy of any publication from the. The stanford linear accelerator pumps large amounts of energy into beams of electrons and positrons, sending them into the pep ii storage ring where the particles can collide, revealing the secrets of fundamental particle processes. Pep ii and babar have just finished run 7, the last run of the slac bfactory. Download printable pdf see the lcls leadership page. Pep ii, is a tworing, highluminosity, asymmetric electronpositron collider built in the pep tunnel at the stanford linear accelerator center slac, and operating at the. With the beginning of the operation of the bfactory, pepii, the linac will.
The fiveyear construction project was carried out by a collaboration between slac, lawrence berkeley national laboratory, and lawrence livermore. Secondary electron emission yields from pepii accelerator. Contributed to particle accelerator conference pac 05, 051620055202005. The pepii b factory at the stanford linear accelerator center slac requires an upgrade of the transverse feedback system electronics. Department of energy office of science and located in menlo park, california. Oct 27, 2006 selfevaluation fy2006 contractor performance evaluation and measurement plan for management and operation of the stanford linear accelerator center volume 1, science and technology, goals 1. The various pep ii performance levels as of october 3, 2001 are. Belle ii, an upgrade to belle, and superpep ii, an upgrade to the pep ii accelerator.
The linac coherent light source at slac takes xray snapshots of atoms and molecules at work, revealing fundamental processes in materials, technology and living things. As the highenergy physics program at slac was shifted to pep, the spear particle accelerator became a dedicated facility for synchrotronradiation research. Superb was canceled, and the proposal for superpep ii was never acted upon. Ppt slac ilc accelerator program powerpoint presentation free to download id. Titanium nitride coating of the aluminum vacuum chamber in the arcs of the positron ring is needed in order to reduce undesirable electroncloud effects. The pep ii design has evolved in a considered fashion from its initial conceptualization to a very advanced level of understanding, well.
Rf engineering and accelerator maintenance llrf design, rf systems upgrades aips, slac rf systems. The slac national accelerator laboratory formerly stanford linear. We present studies of accelerator induced backgrounds in the babar detector at the slac bfactory, carried out using lpturtle, a modified version of the decay turtle simulation package. Pdf pepii large power supplies rebuild program at slac.
All employment decisions are made without regard to race, color, religion, sex, national origin, age, disability, veteran status, marital or family status, sexual orientation, gender identity, or genetic information. Zelanzny, slac abstract the 3 km long linac of the stanford linear accelerator center slac has for many years provided low emittance beams for the slc collider. Slac national accelerator laboratory operated by stanford university for the u. Slac national accelerator laboratory is an affirmative action equal opportunity employer and supports diversity in the workplace. With the beginning of the operation of the bfactory, pepii, the linac will now serve primarily as an injector for the low ler and high energy rings her of pepii. Secondary electron emission yields from pep ii accelerator materials r. The 3 km long linac of the stanford linear accelerator center slac has for many years provided low emittance beams for the slc collider. Remove this presentation flag as inappropriate i dont like this i like this remember as a favorite. Supported by us doe contracts deac0276sf00515 and deac0376sf00098. In addition to being instrumental to running the pep ii storage ring, the stanford synchrotron radiation laboratorys spear storage ring and slac s linear accelerator, slac klystrons have found homes all over the world. Pep was the positron electron project collider at the stanford linear accelerator center slac in menlo park, california. Click here to download the pdf version of this article. These four facilities span a range of beam energies and capabilities, providing a unique opportunity for researchers to find a beam perfectly matched to their experimental needs. Please contact us if youd like more information or if you dont find what youre looking for.
Slac is developing a longrange plan to transfer the evolving scientific programs at ssrl from the spear3 light source to a much higher performing synchrotron source pep x a new storage ring that would occupy the existing pep ii tunnel and support two experimental halls, each containing 16 xray beam lines. Titanium nitride coating of the aluminum vacuum chamber in the arcs of the positron ring is needed in order to. However, belle ii successfully started taking data in 2018 and is currently the. Linac coherent light source slac national accelerator. The accelerator physics issues being addressed in pep ii to reach this goal include the electron cloud instability, beambeam effects. Citeseerx document details isaac councill, lee giles, pradeep teregowda. Status report on the design of a detector for the study of cp violation at pep ii at slac stanford linear accelerator center united states. Parameter pep ii design pep ii present her vertical tune 23. The pep ii storage ring general information about the design of the accelerator which provides interactions for babar to study. Welcome and congratulations on your new position at the slac national accelerator laboratory. Slac training portal slac national accelerator laboratory. Status report on the design of a detector for the study of cp violation at pepii at slac stanford linear accelerator center united states.
Organization linac coherent light source slac national. Simultaneously the interaction of high currents and vacuum chamber elements becomes. Lep was the large electron positron collider at cern in geneva, switzerland. Pep ii was host to the babar experiment, one of the socalled bfactory experiments studying chargeparity symmetry. Slac pep ii and kekb bfactories are progressively increasing currents gaining more and more luminosity 1 2. Lostparticle backgrounds in pep ii are dominated by a combination of beamgas bremstrahlung, beamgas coulomb scattering, radiativebhabha events and beambeam. The babar christening came later, we needed to establish the collaboration council for that. List of accelerators in particle physics wikipedia. Slac marries old particle accelerator to new xray laser cnet.
Department of energy doe office of science laboratory operated by stanford university. The paper presents the cooperative design efforts of lbl, llnl and slac on the magnet power conversion systems for pep ii. Abstracthardware reliability takes on special importance in large accelerator facilities intended to work as factories. Status report on the design of a detector for the study of cp.
Klystron and microwave department capabilities and xband. New employees coming to slac slac national accelerator. Wright subsequently went on to work on the babar collaboration at the stanford linear accelerator center slac. During operation, pep ii with babar has run very well with a mean time to failure of about 28 hours, a mean time to repair of 4 hours with pep ii coasting through some of the repairs, a 92% uptime, and a peak of pb1hour delivered luminosity. Department of energy october 27, 2006 table of contents. Now, 25 years later, pep ii and the babar detector were actually built. The babar detector was built to study b mesons particles produced by slac lbnlllnl pep ii accelerator. Slac national accelerator laboratory, originally named stanford linear accelerator center, is. To run eigenmath in a terminal window, download eigenmath. Performance of the pep ii bfactory collider at slac.
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