Cross Section 7MeV Proton Linac AFRD, LBL (courtesy of Jani Reionen) LINAC SYSTEMS Applied Pulsed Power Plasma Target D+D reaction driven by LASER
Neutron yield M.R. Hawkesworth, Neutron Radiography: Equipment and Methods, Atomic Energy Review 15, No. 2, 169-220, 1977. n µc -1 = n/(µa s) ~10 12 n/s @ 1mA ave D + T 4 He+ n(14mev) D + D T + p 3 He+ n(2.5mev) p + 7 Li 7 Be + n [237keV]!"#$%&'()'*&$+%,-'."&/01'2,%'/,3'&-&%#.'45%+"6/&'7&58'%&56+",-1) 9'!
n µc -1 = n/(µa s) ~10 12 n/s @ 1mA ave :25Hz :1ms duty=0.025 40mA peak @ 2.5MeV Good for RFQ :25Hz = 1µs duty=2.5x10-5 40A peak???? May be for Induction Accelerator
ICR 7MeV Proton Linac RFQ-2MeV DTL-7MeV design value: 50mApk <180pps, 50µs duty <~1% Klystron: L5773 duty<6%, t w <1ms <1.25MWpk
PAC05
High Voltage Shielded Axial Neutron Generator D-D neutron yield of 10 8 n/s 1-2 ma of beam current and 80 kv of acceleration voltage Designed and fabricated for Nuclear Engineering Department, U.C. Berkeley Replaces the 252 Cf radioactive source RF-induction ion source with external antenna Secondary electron filter shroud Titanium coated water-cooled target High voltage insulator Voltage feed-through with coiled water cooling line Accelerator and Fusion Research Division LBNL 10 8 n/s 1-2mA, 80kV Courtsy of Jani Reijonen Ion Beam Technology Program PAC 05, 5/20/05 Slide 1
High Yield Coaxial D-D Neutron Generator for NCT (Neutron Capture Therapy) Application High Voltage Shield Target Water Manifold Al 2 O 3 High Voltage Insulator Target Cylinder Secondary Electron Filter Electrode Ion Source 10 11 n/s 350mA 120kV Vacuum Chamber RF-Antenna Guide RF-Induction Antenna Vacuum Pump Accelerator and Fusion Research Division LBNL Ion Beam Technology Program Courtsy of Jani Reijonen PAC 05, 5/20/05 Slide 2
Coaxial D-D Neutron Generator for EUROSIA in Turin, Italy D-D neutron output 10 11 n/s 120 kv of acceleration voltage 350 ma of extracted D + current Coaxial design with multi extraction slits Delivered to the University of Turin, Italy in November 2004 for NCT studies Courtsy of Jani Reijonen Accelerator and Fusion Research Division LBNL Ion Beam Technology Program PAC 05, 5/20/05 Slide 3
Linac Systems 200 MHz, 0.75 MeV, 2.5 MeV, 20 ma (operating value, not current limit), and 100%. RFQ has a space charge limit of 60 ma. Common practice says not to exceed half of that. Date: Sat, 12 Nov 2005 12:14:50-0700 The RFQ conditioned up very nicely, and continues to do that after each exposure to air. When putting 10 ma of current into the RFQ, we accelerate about 6 ma of protons. Some unknown fraction of the input beam is H2+. We are tuning the resonant coupler today in preparation for exciting the combined structures with rf power. Soon thereafter, we will be looking for accelerated beam through the entire system.
Typical MAP I System Specifications for Ion Beam Surface Treatment Accelerating voltage 400 kv Beam current 40 ka Beam current density (at anode) 200 A/cm2 Pulse width 100 ns Repetition rate 5 pulses/s Energy density at target > 5 J/cm2 Target area >100 cm2 Design lifetime (excluding consumables) >10 7
Pulselac
MAP Ion diode (Magnetically Accelerated Plasma)
Ion Source 1MV? Acceleration +1MV? Target -0.5MV beam dump (<2MeV) Gas or plasma target 1MV GND -0.5MV
Laser Vacuum Pump proton beam Li Plasma Li -0.5MV?
Front Rear
7 Li(p,n) 7 Be, 9 Be(p,n) 9 B ICR 7MeV Proton Linac D+D netron ready Linac system underway APP MAP ion diode? Laser Accelerated Protons?