Status and schedule of SuperKEKB
نویسنده
چکیده
SuperKEKB, which is an upgrade of the KEKB B-factory (KEKB), is a next-generation high-luminosity electron-positron collider with asymmetric energies of 7 GeV (e-) and 4 GeV (e+). Its design luminosity is 8.0 × 10 35 cm-2 s-1 , which is about 40 times than the KEKB's record, and it is expected that the total integrated luminosity will reach 50 ab-1 just over ten years after inauguration. To achieve this challenging goal, bunches of both beams are squeezed extremely to the nanometer scale (0.3 mm across and 100 nm high), and the beam currents are doubled. To realize this, many upgrades must be performed, such as the replacement of magnets and beam pipes, construction of a damping ring for positrons and upgrade of the injector linac and RF systems. The dismantlement of KEKB and construction of SuperKEKB started on July 2010, and they are still underway. The commissioning will start in the second half of the Japanese fiscal year of 2014.
منابع مشابه
Comparison of the Effect of Eight Week Training Program Schedule With Two Different Stretching Patterns Strengthening on Changes in the Status of Lower Cross Syndrome
Objective: Different timing of performing stretching and strengthening exercises can have different effects on the condition of Lower Crossed Syndrome (LCS). This study aims to compare the effects of eight-week training using stretching and strengthening exercises intermittently and simultaneously on the status of LCS in female college students. Methods: In this quasi-experimental study, the s...
متن کاملFactory Developments
The impressive performance of current (KEKB) and recent (PEP-II) B-Factory colliders has increased interest in developing even higher luminosity B-factories. Two new designs are being developed (SuperKEKB and SuperB). Both designs plan to deliver a luminosity in the range of 1×10 cms, nearly 100 times the present B-factory level. Achieving this high luminosity requires high-current beams and sh...
متن کاملBelle II early physics program of bottomonium spectroscopy
The Belle II experiment at the SuperKEKB collider is a major upgrade of the KEK "B factory" facility in Tsukuba, Japan. Phase 1 commissioning of the main ring of SuperKEKB has started in February 2016 and first physics data will be recorded in 2017 during the so-called Phase 2 commissioning, when the partial Belle II detector will be operated still without its vertex detector. In 2018, the full...
متن کاملBeam-beam simulation studies for PEP-II and KEKB
We have performed 3D PIC simulations for PEP-II, SuperKEKB and KEKB parameters by using SLAC[1], LBL[3] and KEK[2] code. Input parameters for PEP-II, SuperKEKB and KEKB are listed in table 1, 2, 3, respectively. The simulation results are shown in Fig. 1, 2, 3 and 4. These results are in reasonable agreement. For PEP-II parameter at the LER horizontal tune of 0.5125, Luminosity by KEK code is s...
متن کاملDevelopment of Button Electrodes for Superkekb Rings
Button-type beam position monitors for SuperKEKB rings have been designed. The RF characteristics such as beam response, trapped modes or wake functions have been simulated using 3-D E-M codes such as GdfidL and HFSS. The estimated instability threshold from the trapped modes was much higher than the radiation damping time. The prototype units have been tested in the prototype-antechambers inst...
متن کامل