I128 - 128 Channel Charge Integrator Digital Electrometer

The I128 is Pyramid's flagship dosimeter instrument. It enables our scanning nozzle to deliver unparalleled precision and speed.


  • 128 parallel charge integrating channels
  • 1 gated integrator channel for dose plane
  • 1 trigger input and trigger pass-through
  • 1 fiber-optic pulse output proportional to dose plane
  • 1 fiber-optic output for beam control
  • 1 high voltage supply output with loop-back verification
  • Safety relay output
  • Ion chamber temperature, pressure, and humidity sensor inputs
  • Fiber-optic loop control handling many Pyramid slave devices
  • Capable of executing and verifying pencil beam treatment plans
  • Integrated precision current sources for on demand calibration
  • 10kHz buffered data available over Ethernet RPC connection
  • Compact 1U 19" format


  • Paired with an IC128-25
  • Particle therapy beam position measurement and dosimeter
  • Multi-strip ionization chamber measurement
  • Particle range verification measurement
  • General high desnity low-current measurement
HV emco

Integrated High Voltage

  • Avoids the need for a separate external HV supply.
  • Precise programmable voltage control.
  • Choice of polarity, positive or negative, and range up to 3000V depending on the product.
  • Shared ground with measurement electronics to eliminate ground loops.
  • Short circuit protection and redundant output voltage monitoring.

IG2 EPICS Support

Integrate device data collection and configuration into an EPICS system, without writing a single line of code using IG2.

  • Runs on Windows and Debian Linux
  • Change PV names with simple XML configuration
  • Connect to multiple Pyramid devices at once
  • Add custom scale factors and offsets on a PV basis
  • Never have to recompile
  • Professional Pyramid support for bugs and features


Configurable EPICS channel access server for G2 and G1 devices

CM100 Render


Particle Therapy Control Console

MLFC-128 Render


Multi-Layer Faraday Collector for Particle Energy Measurement



Ly Faraday Lõi Rắn cho Hạt Có Sạc

IC256-45 Render


256 Strip QC Ion Chamber

F460 Front Render


4 Channel Precision Electrometer with High Voltage



Fast Digital Electrometer

F3200E Render


32 Channel Fast Digital Electrometer

IC101 Render


Precision Electrometer Digital Current Integrator with High Voltage

I400 Render


4 Channel Biased Input Charge Integrating Electrometer

I404 Render


4 Channel Charge Integrating Digital Electrometer

I128 Render


128 Channel Charge Integrator Digital Electrometer

Related Papers

A Large-area High Resolution Imaging Detector System for PBS Quality Assurance

New dual-layer ionization chamber enhances beam scanning resolution in particle therapy.


A Multifunction Isocenter Diagnostic for Beam Characterization in Pencil Beam Scanning Systems

Developed a diagnostic system for characterizing pencil beam scanning.


An Enhanced System for Pencil Beam Characterization

Multilayer Faraday collector enhances pencil beam scanning system.


Scanning Amplifier Implementation at Massachusetts General Hospital

Discusses the use of fast amplifiers in particle beam scanning for radiotherapy.