Abstract: Disclosed herein is a method of determining whether repair or replacement of thyratron of a radiotherapy device should be scheduled. The radiotherapy device comprising a linear accelerator and being configured to provide therapeutic radiation to a patient. The radiotherapy device comprising a thyratron; and at least one sensor configured to provide a signal indicative of a start-up time associated with the thyratron. The method comprises receiving the start-up time and based on the start-up time, determining whether repair or replacement of the thyratron should be scheduled.

Abstract: Systems and methods for injecting gas into a fluidized bed of particles are provided. The system can include a gas distribution system. The gas distribution system can include a header having a flow passage and a nozzle body coupled to the header. The nozzle body can have an inlet end in fluid communication with the flow passage and an outlet end positioned outside of the header. The nozzle body can have a longitudinal axis that is substantially perpendicular to a direction of flow through the flow passage. The nozzle body can have an orifice positioned between the inlet end and the outlet end.

Abstract: Systems and methods for injecting gas into a fluidized bed of particles are provided. The system can include a gas distribution system. The gas distribution system can include a header having a flow passage and a nozzle body coupled to the header. The nozzle body can have an inlet end in fluid communication with the flow passage and an outlet end positioned outside of the header. The nozzle body can have a longitudinal axis that is substantially perpendicular to a direction of flow through the flow passage. The nozzle body can have an orifice positioned between the inlet end and the outlet end.