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Design goal :-Increased Yield By 50%. -Low and quick maintenance cycle. -Suitable to Multi-geometrical internal volume Chamber. -Stand alone uPLC- PC GUI. -Low cost High reliability.
Future Projects:-New valves layout for less radiation damage.-One isolation foil used in grid flange, Water cooled, no helium.
Improvement of the 11C gas target Erol Bars, Munawwar Sajjad , Mike Haka, Steve Toorongian
Department of Nuclear Medicine
11C in Maintenance condition11C Target Properties:
Internal gas Volume:188cc
Length internal Chamber: 8.5”
Orifice in: 0.472”
Orifice OUT: 2”
Water Flow: 6-8Lm
2X2way GE valves used
(COLD CUBE control - Cole Parmer)
1 kulite Pressure sensor
All Aluminum parts 6061
Isolation Foils: 25um Al (Tron Side)
0.5mm Al 2024(0.02”) (Trg)
Target face O-ring :Viton
Helium flow: 50L/min.
Energy: 22.5Mev
Beam Current: 35-40uA
Previous Target
11C Design concept
uPLCTarget 11C (Nemo) Software
-Visual basic 6.0 used as GUI
- Communication protocol serial.
-Stand alone platform (File.exe)
Pic microcontroler: PIC16F876:22I/O,5AN,Ser,PWM, 8K x 14 words Flash,20MHZ….
Software: PicBasic Pro Compiler MicroCode Studio ,MPLAB Chip burner: PicStart+
11C Yield Gas used 1%Oxygen+Nitrogen
PSI vs BEAM (uA)
01020304050
370 420 460 495 530 560 587 620PSI
Bea
m I
I vs PSI
Energy Current Time Initial Pressure
Run PSI Batch in LAH
22MeV 35uA 60min 310Psi 595Psi 4.8-5.1Ci(145mCi/uA)
40uA 60min 310Psi 620Psi >5.1Ci
Average data graph over 100 runs Results
Future Projects.
Aluminum Properties: Melting point 933.5KThermal Conductivity:
237 W m-1/K-1 (@ 27C)
Ag Properties: Melting point 1235.08KThermal conductivity:
429 W m-1/K-1 (@ 20C)
Water Cool Grid Foil flange (one foil used)
500W power analysis.
491K
Cosmosflowork
Grid Face
11C Target #2 New Layout
Conclusion: Projects has shown all the design goals.