• X. Yin, S. Fu, K.Y. Gong, L. Liu, J. Peng, H. Song, Y.C. Xiao
  IHEP Beijing, Beijing

The CSNS is a spallation neutron research facility being built at Dongguan in Guangdong Province [1]. The 324MHz Alvarez-type Drift Tube Linac (DTL) will be used to accelerate the H^- ion beam from 3 to 80.0 MeV with peak current 15mA. The R&D of a prototype structure at the low energy section of DTL is taking place at IHEP. The first unit tank 2.8m in length for the energy range from 3 to 8.88 MeV and 28 drift tubes containing electromagnetic quadrupoles are developed. This paper introduces the R&D status of the tank and 28 drift tubes. The measurement results of the focusing quadrupoles are also presented.

• X. Yin, S. Fu, K.Y. Gong, J. Peng, Q.L. Peng, Y.C. Xiao, B. Yin
  IHEP Beijing, Beijing

In the 324MHz CSNS Drift Tube Linac, the electromagnetic quadrupoles will be used for transverse focusing. The R&D of the quadrupole for the lower energy section of the DTL is a critical issue because the size of the drift tube at this section is so small that it is not possible to apply the conventional techniques for the fabrication. Then the electromagnetic quadrupoles containing the SAKAE coil and a drift tube prototype containing an EMQ have been developed. In this paper, the details of the design, the fabrication process, and the measurement results for the quadrupole magnet are presented.

• X. Yin, S. Fu, K.Y. Gong, A.H. Li, H.C. Liu, J. Peng, Z.R. Sun, Y.C. Xiao
  IHEP Beijing, Beijing

In the China Spallation Neutron Source project [1], the 324HMz Alvarez-type DTL will be used to accelerate the H^- ion beam from 3 to 80.0MeV. The DTL linac has been designed as four tanks and the electromagnetic quadrupoles will be used for the transverse focusing inside the drift tubes. The geometries of the DTL cells were optimized by using SUPERFISH and the beam dynamics simulation was performed with PARMILA code. In this paper both the physical design and the engineering designs are presented.