$IAEA_INDEX: 409 // IAEA website: www-nds.iaea.org/phsp/electron/ $TITLE: SIEMENS Oncor, 9MV, part 2 $FILE_TYPE: 0 $CHECKSUM: 2530624767 $RECORD_CONTENTS: 1 // X is stored ? 1 // Y is stored ? 0 // Z is stored ? 1 // U is stored ? 1 // V is stored ? 1 // W is stored ? 1 // Weight is stored ? 0 // Extra floats stored ? 1 // Extra longs stored ? 2 // LATCH EGS variable stored in the extralong array [ 0] $RECORD_CONSTANT: 19.0000 // Constant Z $RECORD_LENGTH: 33 $BYTE_ORDER: 1234 $ORIG_HISTORIES: 100000000 $PARTICLES: 76685599 $PHOTONS: 17019400 $ELECTRONS: 59662592 $POSITRONS: 3607 $TRANSPORT_PARAMETERS: NIST bremsstrahlung cross section See B.A. Faddegon, B. Perl and M. Asai, "Monte Carlo simulation of large electron fields", PMB 53 (2008) 1497-1510. $MACHINE_TYPE: SIEMENS Oncor (Siemens Oncology Care Systems, Concord, USA) $MONTE_CARLO_CODE_VERSION: BEAMnrc, v.1.104, July 24, 2008 EGSnrc, v.1.40, July 24, 2008 $GLOBAL_PHOTON_ENERGY_CUTOFF: 0.001 $GLOBAL_PARTICLE_ENERGY_CUTOFF: 0.700 $COORDINATE_SYSTEM_DESCRIPTION: Z=0 correspond to the exit windows plane // OPTIONAL INFORMATION $BEAM_NAME: $FIELD_SIZE: Complete phasespace at 19 cm from the exit windows. $NOMINAL_SSD: 100 cm $MC_INPUT_FILENAME: $VARIANCE_REDUCTION_TECHNIQUES: $INITIAL_SOURCE_DESCRIPTION: Source 19 modified to permit a Gaussian angular distribution with arbitrary beam direction $PUBLISHED_REFERENCE: Faddegon, B.A., Sawkey D, O'Shea T, McEwen M, Ross C., "Treatment head disassembly to improve the accuracy of large electron field simulation", Med Phys. 36 (2009) 4577-91. Faddegon, B.A., Perl,B. and Asai,M., "Monte Carlo simulation of large electron fields", PMB 53(2008) 1497-1510. $AUTHORS: Faddegon BA, e-mail: bfaddegon@radonc.ucsf.edu $INSTITUTION: Department of Radiation Oncology, UC San Francisco Comprehensive Cancer Center, San Francisco, California 94143-1708, USA. $LINK_VALIDATION: http://dx.doi.org/10.1118/1.3218764 (requires electronic access to the Medical Physics journal) $ADDITIONAL_NOTES: This is IAEA header as defined in the technical report IAEA(NDS)-0484, Vienna, 2006 Author's note: JAWS and MLC BEAM modules are needed to transport these phsps downstream to the phantom surface. Information may be requested from the author. $STATISTICAL_INFORMATION_PARTICLES: // Weight Wmin Wmax Emin Emax Particle 1.70194E+07 1 1 1.073 0.001 10.68 PHOTONS 5.96626E+07 1 1 8.642 0.1886 10.4 ELECTRONS 3607 1 1 2.14 0.1891 8.162 POSITRONS $STATISTICAL_INFORMATION_GEOMETRY: -6 6 -6 6