Structural Modeling of Tesla TDR Positron Target

Stein, W ; Sheppard, J C

Lawrence Livermore National Laboratory

关键词: Stresses;    Heating;    Photon Beams;    36 Materials Science;    Thermal Expansion;   

DOI  :  10.2172/15003399
RP-ID  :  UCRL-ID-148939
RP-ID  :  W-7405-ENG-48
RP-ID  :  15003399

美国|英语

来源: UNT Digital Library

【 摘 要 】

The Tesla positron target is a 0.4 radiation length thick titanium target that is rotating with a speed of 50 m/s at its periphery. Energy deposition from one pulse occurs over 1 millisecond and results in heating of the target over a 5 cm arc of material. The 22.2 MeV photon beam has a spot size of 0.75 mm and results in a maximum temperature jump of 440 C. Stresses are induced in the material from thermal expansion of the hotter material. Peak effective stresses reach 38 Ksi (2.7 x 10{sup 8} Pa), which is lower than the typical yield strength of a titanium alloy by a factor of about 3.