Outline Introduction : KOMAC & RI production plan Beam line design

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Presentation transcript:

Design Study on the Beam Line for RI Production at KOMAC The 18th International Conference on Accelerators and Beam Utilizations November 13, 2014 Hyeok-Jung Kwon, Han-Sung Kim, Sang-Pil Yun, Seong-Gu Kim, Yong-Sub Cho KOMAC, KAERI

Outline Introduction : KOMAC & RI production plan Beam line design Target design Summary

Features of KOMAC 100MeV linac Linac and Beam Lines Features of KOMAC 100MeV linac 50-keV Injector (Ion source + LEBT) 3-MeV RFQ (4-vane type) 20 & 100-MeV DTL RF Frequency : 350 MHz Beam Extractions at 20 or 100 MeV 5 Beamlines for 20 MeV & 100 MeV Output Energy (MeV) 20 100 Max. Peak Beam Current (mA) 1 ~ 20 Max. Beam Duty (%) 24 8 Avg. Beam Current (mA) 0.1 ~ 4.8 0.1 ~ 1.6 Pulse Length (ms) 0.1 ~ 2 0.1 ~ 1.33 Max. Repetition Rate (Hz) 120 60 Max. Avg. Beam Power (kW) 96 160 Linac Ion Source 100MeV Beam lines 20MeV Beam lines KOMAC started operation in 2013 Now, 2 beam lines are operating (1 for 20MeV, 1 for 100MeV)

KOMAC Site (Gyeongju) 100MeV Linac Target Room Easy access : 2km from KTX Station (2 hours from Seoul) : Near to Pohang and Busan 100MeV beam supply to users : 1,569 irradiation samples in 2014 Inspection of facility for 10kW beam operation license was done by KINS at Nov. 11, 2014 Site: 180,000 m2 Building : 39,000 m2 Electricity : 154 kV, 20 MVA

PET imaging, Cardiology RI Production Plan Nuclides Sr-82 Cu-67 Application PET imaging, Cardiology (Sr-82 / Rb-82 generator) Cancer therapy Half life 25.4 days 61.9 hours Reaction Nat Rb (n, xn) 82Sr 68Zn (p, 2p) 67Cu Main Gamma 511keV 91.266keV / 93.311keV / 184.577keV Target RbCl Zn / ZnO Beam 100MeV, 60kW, 4 weeks 100MeV, 60kW, 2days Construction plan To start the beam line construction in 2015 Operation plan User beam service at day-time RI production at night-time

RI Production Strategy Installation of the chemical processing & GMP facilities are not considered at KOMAC For chemical processing of target & manufacturing RI product Irradiation targets are transported to other facility which already has chemical processing facility (for example HANARO, ARTI, Gijang reactor facilities in KAERI) KOMAC Other facilities 100MeV proton irradiation Facility Target development Target preparation Target irradiation Target processing Hot-cell Target disintegration Chemical processing (separation & refining) Manufacturing RI product Target transportation HANARO : 30MW Research reactor at KAERI, RI production ARTI : Advanced Research Technology Institute, KAERI branch, 30MeV Cyclotron RI production Gijang reactor facilities : Will be constructed, KAERI branch, 40 min by car

RI Production Facilities Based on Linac  Facility / Institute KOMAC / KAERI BLIP / BNL IPF / LANL Energy [MeV] 100 202 Peak current [mA] 20 37 13.335 Pulse width [us] 500 425 625 Rep rate [Hz] 60 6.67 30 Duty [%] 3.0 0.3 1.9 Average current [mA] 600.0 104.9 250.0 Peak power [MW] 2.0 7.5 1.3 Average power [kW] 60.0 21.2 25.0 Energy per pulse [J/pulse] 1000.0 3176.5 833.4 Target diameter [mm] 75 50 Beam size (FWHM) [mm] 14.2 * 12.4 19 * 12.5 12.5 Scanning method Wobbling Without scan Beam window AlBemat Be+AlBemat+STS Inconel

KOMAC Beam Line 100MeV DTL TR105 TR101 KOMAC beam line TR104 TR103

Beam Line for RI Production BM1 FCV Proton beam QM2 QM1 DTL QM3 QM4 BM2 Penetration hole to beam line hall Penetration hole to Hot cell QM5 Target transport Target cooling skid Target room (6m X 4m) Beam window & Target BM3 QM6 Hot cell BM4 Beam scanning Target room (TR101) Preparation room (PR101) Shielding door Major components 1.5T, 45 degree bending magnet Beam scanning Beam window Target Preparation room

Beam Optics QM1: 1.95608, 200mm QM2: 1.5, 400mm QM3: 3.5, 400mm Beam radius at target (rms) x : 6.0mm, y: 5.3mm Beam size at target (FWHM) x : 14.2mm, y: 12.4mm

45 degree bending magnet Magnetic rigidity : 1.5 Tm Bending radius : 1 m Bending angle : 45 degree Pole gap : 90 mm GFR width : 100mm Field uniformity within GFR : 0.1% Shape : Rectangular Type : H magnet Parameter scan Pole width : 310mm Ampere factor : 1.48 Designed magnet can be installed within a given space Most parts < 1.5T At the edge < 2 T At the local point at the edge > 2T

Beam Scanning Main consideration To reduce the heat load in local point To install within limited space / with simple components Method Rotating a Halbach dipole array 2 sets array

Beam Spot Positions at the Target Without scanning Scanning with 2 magnets (0.1Hz / 1.1Hz, 3000 G cm / 9000 G cm) Scanning with 1 magnet (1Hz, 9000 G cm)

Heat Load at the Target Gaussian distribution with 6mm rms beam radius Without scanning Scanning with 2 magnets (0.1Hz / 1.1Hz, 3000 G cm / 9000 G cm) Relative magnitude of the maximum heat load 21.9 : 1.7 : 1 More uniform irradiation into the target By using 2 magnets (efficiently use the target) Scanning with 1 magnet (1Hz, 9000 G cm)

(Multiple beam window) Beam Window – Option 1 Fixed cooling manifold for target assembly is attached to the window assembly Water cooling for both window and target To prevent the water leakage into the beam line, multiple windows are used Several rupture of the STS window at BLIP (mainly corrosion) BLIP case (Multiple beam window) Cooling water Be AlBeMat STS Fixed part at target room Target assembly from the hot cell

Beam Window – Option 2 Fixed cooling manifold for target assembly is separated from the beam window assembly One window, one water cooling path for target only Beam window cooling : Forced air Accelerator side : relatively safe from the contamination FCV can protect the accelerator when window is ruptured AlBeMat STS Cooling water Fixed part at target room Target assembly from the hot cell

RI Production Target Assembly Design RI targets (RbCl) are encapsulated in metal cladding The cladding material was considered SUS316 or Inconel alloy Targets are immersed in cooling water RI target Target holder Target Assembly

RbCl Target Fabrication Study RbCl target fabrication test at KOMAC Pellet fabrication – RbCl powder compression Target fabrication – Enclose the pellet with clad 100 Ton press Punch and mold for powder compression

RbCl Pellet Fabrication Process Powder preparation (dry in vacuum oven) Milling Weighting RbCl pellet Powder compression Powder inside the mold

50mm diameter RbCl pellet Pellet thickness depending on pellet weight RICl Pellet Compression condition Pressure: 350MPa Adjusting RbCl weight to achieve desired thickness Thickness is linearly increase according to RbCl weight Achieved about 98% of theoretical density (theoretical density of RbCl : 2.76 g/cm3 ) 50mm diameter RbCl pellet Pellet thickness depending on pellet weight

Target Cladding Cladding without leakage is important not to contaminate the cooling system Cladding material : STS 316 & inconel Welding method 1 : EB welding (based on BLIP method) Welding method 2 : Laser welding (Cheaper and more available than EB welding) Target with RbCl pellet and cladding can be prepared at KOMAC Welding RbCl pellet inside cladding cladding Penetration test to check leak tight after welding

Thank you for your attention Summary KOMAC & Its RI production plan Major components of the beam line 90 degree bending magnet Scanning magnet Beam window Target study RbCl pellet fabrication Target cladding Thank you for your attention www.komac.re.kr