Speaker
Description
A 24-MeV prototype LINAC is under development at Sapienza University of Rome for FLASH radiobiological studies. The injector is a 12-keV triode thermionic electron gun from HeatWave Labs, providing grid-controlled current modulation for high current, low perveance, and short-pulse operation. To optimize its integration with the 24 MeV C-band hybrid standing and travelling wave structure, extensive particle tracking simulations of electron gun were performed using CST Particle Studio. Parametric scans of the anode voltage and grid potential were used to evaluate beam current, perveance, and emittance, identifying operating points that balance beam stability and charge for FLASH applications.
As the modern dispenser cathode requires stringent vacuum conditions below 1E-6 mbar, the LINAC was also modeled in Molflow+ to predict pressure profiles under realistic gas-load scenarios. Simulations revealed a potential vacuum limitation near the gun, leading to the design and implementation of an additional pumping port for better evacuation of gas molecules.
These results are benchmarked with initial experimental tests performed on an electron gun test bench at Sordina IORT Technologies and with Flash LINAC at the department of Basic and Applied Sciences for Engineering in Sapienza.
The combined simulation and experimental validation provides key requirements of an injector for a compact commercial LINACs for Flash applications.
| In which format do you inted to submit your paper? | Word |
|---|