scholarly journals Design and analysis of vacuum pumping systems for Spallation Neutron Source drift-tube linac and coupled-cavity linac

2002 ◽  
Author(s):  
A. Shen ◽  
L. Tung ◽  
K. Kishiyama ◽  
W. Nederbragt ◽  
J. Bernardin ◽  
...  
Keyword(s):  
Neutron Source ◽  
Drift Tube ◽  
Spallation Neutron Source ◽  
Drift Tube Linac ◽  
Coupled Cavity

scholarly journals Thermal Analyses and Frequency Shift Design Studies for the Spallation Neutron Source Drift Tube Linac

2001 ◽  
Author(s):  
Lucie Parietti
Keyword(s):  
Finite Element ◽  
Frequency Shift ◽  
Neutron Source ◽  
Drift Tube ◽  
Waste Heat ◽  
Cooling System ◽  
Normal Operation ◽  
Spallation Neutron Source ◽  
Rf Heating ◽  
Drift Tube Linac

Abstract Los Alamos National Laboratory is responsible for the design of the room-temperature linac for the Spallation Neutron Source (SNS). This linac consists of a Coupled-Cavity Linac (CCL) and a Drift Tube Linac (DTL). During normal operation, about 80% of the Radio Frequency (RF) power is dissipated in the DTL cavity walls. This waste heat causes the cavities to expand, causing shifts in their RF resonant frequency. The DTL relies on the water cooling system to compensate for the frequency shift caused by RF heating. To guide the design of the cooling system and the frequency control scheme, thermal expansion and frequency shift studies for several DTL cells are performed via numerical simulations. Temperature distributions and thermal deformations resulting from RF heating are evaluated separately for the tanks and 22 drift tubes using finite element models. The frequency shift of these cells are then computed based on the calculated deformations. Size and locations of the cooling channels are designed accordingly to provide adequate cooling and minimize frequency shift. The tank finite element model used to predict the tank temperature profile is benchmarked against experiment data.

Beam dynamics design for a compact accelerator-driven neutron source

2018 ◽  
Vol 27 (04) ◽  
pp. 1850031
Author(s):  
Haipeng Li ◽  
Pingping Gan ◽  
Qi Fu ◽  
Qiuyun Tan ◽  
Yuanrong Lu ◽  
...  
Keyword(s):  
Dynamic Simulation ◽  
Neutron Source ◽  
Drift Tube ◽  
Transmission Efficiency ◽  
Beam Dynamics ◽  
Radio Frequency Quadrupole ◽  
Drift Tube Linac ◽  
Peking University ◽  
Average Current ◽  
Simulation Results

A compact accelerator-driven neutron source (CANS) has been proposed and designed by the Peking University (PKU) RFQ group. The source is based on a compact deuteron RF accelerator that delivers an average current of a few mA of deuterons at 11[Formula: see text]MeV to the target. The accelerator consists of a short radio frequency quadrupole (RFQ) followed by efficient interdigital H-mode drift tube linac (IH-DTL) structure. The total length of the whole accelerator structure is 4.96[Formula: see text]m, including 1.76[Formula: see text]m for the 4-vane RFQ and 2.70[Formula: see text]m for the IH-DTL. The dynamic simulation results show that the beam has excellent quality, with transmission efficiency higher than 99%. The transverse and longitudinal normalized rms emittance at the DTL exit is 0.29[Formula: see text]mm⋅mrad and 0.12 MeV⋅deg, respectively. Details of the beam dynamics of the RFQ and IH-DTL are presented in this paper.

Sign in / Sign up

Export Citation Format

Share Document