The Superconducting Radio Frequency (SRF) system of the upgrade project of the Beijing Electron Positron Collider (BEPCII) has been in operation for almost 8 years. During operation, many problems have been encoun...
Supported by National Basic Research Project(973)(2011CB808302,2011CB808304)
Photoinjectors are widely used for linear accelerators as electron sources to generate high-brightness electron beams. The drive laser, which determines the timing structure and quality of the electron beam, is a cruc...
Supported by National Basic Research Project(2011CB808302);National Natural Science Funds(11075007)
Peking University is designing a new SRF gun that is composed of a quarter wave resonator (QWR) and an elliptical cavity. Compared to the elliptical cavity, the QWR is sufficiently compact at the same frequency and...
Supported by China Scholarship Council, Brookhaven Science Associates, LLC (DE-AC02-98CH10886) with the U.S. DOE
A great deal of effort has been made over the last decades to develop a better polarized electron source for high energy physics. Several laboratories operate DC guns with a gallium arsenide photocathode, which yield ...
Supported by Major State Basic Research Development Program (2002CB713600, 2008CB817706)
RF superconducting (SRF) cavities can work in continuous wave mode or long pulse mode. SRF technology has been developing rapidly since the end of the last century. RF superconducting technology is widely used in pa...
Supported by National Basic Research Program of China (2002CB713600)
Niobium is widely used in SRF (Superconducting Radio Frequency) cavities due to its excellent superconductivity and workability. With the continuous development of technology, higher demands of material are raised. ...
The static heat loss and unloaded Q_0 are the most important values for both the cryogenic and the RF systems.The BEPCⅡ SRF cavity operates in a liquid helium bath contained in a vacuum insulated,liquid nitrogen cool...