• Topic ID: id_16157823
  • Version: 1.0
  • Date: Jul 7, 2018 4:34:19 PM

X-Ray Theory Introduction (LS16, Ultra, Plus)

1 Functional Overview

The X-Ray generation subsystem for Lightspeed 5.x systems is completely different compared to previous Lightspeed products. It is based on the "Jedi" platform. Jedi is the engineering name for a family of compact high frequency X-Ray generators. This generator family covers a wide range of applications from mobile equipment RAD/RF up to this state of the art CT system. The X-Ray generator in this system is capable of operating at a peak power of 53.2kW.

2 Architecture

See Figure 1.

Figure 1. JEDI 60DC Functional Architecture

2.1 JEDI Core

The Jedi family is composed of:

  • High voltage chain composed of kV control, HV power inverter and HV tank

  • Anode rotation function

  • Tube filaments heater function

  • Control bus for communication between the functions

  • DC bus for power distribution to each function

  • Input voltage to DC conversion: AC/DC function

  • Low voltage power supply

  • Application software, running on the kV control board

These functions are the Jedi core. They are present in all versions of the generator.

2.2 Unique Functions

A function can be unique for all products or can be derived in several releases based on product specification.

Examples:

  • Anode rotation function is declined in two releases:

    • low speed rotation for applications where the tube is a 3000 rpm max tube

    • high speed/low speed rotation for applications where at least one of the tubes is a 8000-10000 rpm tube. (For Jedi 60DC, only high speed is used.)

  • Control bus is unique

3 System Packaging and Field Replaceable Units

The X-Ray generation subsystem has the following major FRU's, not including any collimator components.

  • X-Ray Tube (equipped with the following):

    • Heat Exchanger

    • Heat Exchanger Filter

    • Oil Pump

  • Three components (Power Unit, Auxiliary Unit, and HEMIT Tank) contain the following major FRU’s: