Sergey Antipov, J. Qiu, C. Jing, A. Kanareykin Euclid Techlabs LLC Ultra-Compact RF Accelerator for Industrial Applications (electron RF linacs as gamma ray sources) Sergey Antipov, J. Qiu, C. Jing, A. Kanareykin Euclid Techlabs LLC 11/13/2015

Euclid produces S-band photo injectors Availability of sources

Where ultra compact is important? The entire accelerator system, including its modulator, other electronics, and cooling system, must be confined to a diameter of about 4 inches and a length of 20 feet and be operated remotely through perhaps 10 km of cable. From “Present and Future Applications of Industrial Accelerators”. SLAC eCONF C8905261 Craig S. Nunan (Varian Associates, Inc), 1989

Dielectric – loaded accelerating structures Iris-Loaded waveguide Dielectric-Loaded waveguide Dielectric-Loaded waveguide TM01-TE10 coupler rf output port Important things to consider: Charging (DC – conductive ceramics) Multipactor (TiN - coatings)

Pencil – size accelerator Input energy 20 keV Input current 10 mA Number of cells 10 RF power (peak) 78.9 kW RF power (average) 80 W Output energy 301 keV Total Length 10 cm ID 3.0 mm Max. OD 9.3 mm MCT ceramics: ε = 20 Metallized on the outside with ~ 100μ copper layer 9.4 GHz Euclid proprietary

Ultimate goal: ultra compact X-band accelerator for security and medical applications acc. structure magnetron modulator

Ultra - compact (ultra - light) for x-ray radiography non-destructive evaluation (NDE) Magnetron + modulator Funded by DOE SBIR (Phase I) Euclid proprietary

BROKK @ industrial exhibit (courtesy of BROKK, Inc.)

Geant4 gamma ray spectrum Ultra - compact (ultra - light) for x-ray radiography Frequency 9.4 GHz Energy 1 MeV Average Current 50 µA RF power 250 kW Duty factor 0.001 Electron gun energy 20 keV Dose rate @ 1 m 38 mGy/min Structure length 40 cm Geant4 gamma ray spectrum 1 MeV e-beam, 50mGy/min dose rate, 1 sec integration M. Uesaka et. al. E-Journal of Advanced Maintenance Vol.5-2 (2013) 93-100 Euclid proprietary

X-band (~10 GHz) dielectric loaded accelerator Possible designs X-band (~10 GHz) dielectric loaded accelerator Frequency Light - 500 Medium - 1000 High - 3000 Energy 500 keV 1 MeV 3 MeV Average Current 40 uA 100 uA RF 50 kW 250 kW 1500 kW Duty 1e-3 E-gun 20 keV Structure length 40 cm 80 cm Euclid proprietary

Progress and plans Designed and built two (300keV and 500keV) options Cold test: coupling, beadpull – field balance Euclid holds a joint patent with S&P500 company Upcoming milestones: Condition structure to 80kW (by end of 2015) Beam current transmission studies (early 2016) Euclid proprietary

Conclusions Euclid is developing an ultra-compact and light 1 MeV electron accelerator Cold tests have been done on a first prototype High power tests are planned for the end of 2015 These will determine practical limits of our technology, e.g. max current, beam power, reliability. Euclid gratefully acknowledges the support from the DOE SBIR Program.