Posted in | Particle Detectors

Detection of Positive and Negative Ions with Capability of Measuring Large Proteins – Electron Multiplier R6985-80

When positive ions strike the conversion dynode it emits electrons in proportion to the quantity of input ions. The resulting electrons are then directed into the electron multiplier for secondary multiplication.

When negative ions strike the conversion dynode it emits positive ions in accordance with the amount of input ions. The resulting positive ions are then guided into the electron multiplier, where they receive energy from the variation in potential between the electron multiplier and conversion dynode and strike the electron multiplier’s first dynode, releasing electrons in proportion to the quantify of input positive ions. The emitted electrons are then directed to the second and successive dynodes for secondary multiplication.

Download the Brochure for More Information

Specifications

General

Parameter Description / Value Unit
Input Aperture Diameter F11 mm
Dynode Structure Conversion + box and linear focused
Number of Dynode Stages 19
First Dynode Material Al2O3
Total Built-in Resistance 17.15 MO
Operating Ambient Temperature -30 to +50 °C
Storage Temperature -80 to +50 °C
Polarity of Detected Ions Positive / Negative

 

Maximum Ratings

Parameter Value Unit
Anode to First Dynode Voltage -3000 V
Anode to Last Dynode Voltage 350 V
Conversion Supply Voltage ±10 kV
Operating Vacuum Level 1 x 10-2 Pa
Bake-Out Temperature (at 5 x 10-3 Pa) No baking
Average Anode Current* 10 µA
Operating Gain 1 x 108

 

Characteristics

Parameter Value Unit
Recommened Supply Voltage -1900 V
Gain (Typ.) 1 x 106
DC Linearity (Typ.) 5 µA
Dark Current (Max.) 1 PA
Rise Time (Typ.) 4.5 ns
Anode to All Other Electrode Capacitance 1.8 pF

NOTE: * Averaged over any interval of 30 seconds maximum. Figure 2: Dimensional Outline (Unit: mm)

Other Equipment by this Supplier

Azthena logo

AZoM.com powered by Azthena AI

Your AI Assistant finding answers from trusted AZoM content

Azthena logo with the word Azthena

Your AI Powered Scientific Assistant

Hi, I'm Azthena, you can trust me to find commercial scientific answers from AZoNetwork.com.

A few things you need to know before we start. Please read and accept to continue.

  • Use of “Azthena” is subject to the terms and conditions of use as set out by OpenAI.
  • Content provided on any AZoNetwork sites are subject to the site Terms & Conditions and Privacy Policy.
  • Large Language Models can make mistakes. Consider checking important information.

Great. Ask your question.

While we only use edited and approved content for Azthena answers, it may on occasions provide incorrect responses. Please confirm any data provided with the related suppliers or authors. We do not provide medical advice, if you search for medical information you must always consult a medical professional before acting on any information provided.

Your questions, but not your email details will be shared with OpenAI and retained for 30 days in accordance with their privacy principles.

Please do not ask questions that use sensitive or confidential information.

Read the full Terms & Conditions.