Xbox 2 interlocks
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XBOX 2 Interlocks. Joseph Tagg. XBOX2 Interlocks. Ion Pump Controllers. Ion Pump Controllers. Ion Pump Controllers. Modulator. Water. RF Valves. Vac 10e-5. HV Enable. serial. logic. PXI. Interlock FPGA. Serial. Vac 10e-7. XBOX 2 Interlocks. Many independent interlock sources

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XBOX 2 Interlocks

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XBOX 2 Interlocks

Joseph Tagg


XBOX2 Interlocks

Ion Pump

Controllers

Ion Pump

Controllers

Ion Pump

Controllers

Modulator

Water

RF

Valves

Vac 10e-5

HV Enable

serial

logic

PXI

Interlock

FPGA

Serial

Vac 10e-7


XBOX 2 Interlocks

  • Many independent interlock sources

  • Each can be defined in one of two ways

    • Normal: stops RF

    • Critical: stops RF and sends interlock to modulator

  • Possibility to add more if needed

  • Normal interlock status propagated through backplane and externally. Critical interlock status propagated externally


Interlock properties

  • Once set, needs an explicit signal to reset

  • Interlock FPGA logic runs as soon as powered and runs regardless of software state

  • Starts in interlock status and uses a watchdog to interlock if no communication from software within a second

  • Software configurable


Structure

reset

Interlock

Interlock source

Interlock latched

Critical Interlock

Status

Interlock

Interlock source

Interlock latched

Global Interlock

Status

OR

Interlock

Interlock source

Interlock latched


To do

  • Redundancy

  • Fail-safe mechanisms


Interlock sources and severity

  • Breakdown: normal

  • Vacuum <1e-5: critical

  • Watchdog elapses (software problem): critical

  • Software: normal

  • Water: critical

  • RF valves: critical

  • Modulator: critical


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