download pps presentation at the wttc12 2008 in seattle

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.