D/H Mass Spectrometer, an import substitute, is a very versatile analytical instrument. It is used for the measurement of D/H (Deuterium/ Hydrogen) ratio in water and hydrogen samples. It consists of sample inlet system, electron impact ion source, analyzer and faraday cup collectors. Two independent collector assemblies have been incorporated to collect H₂⁺ and HD⁺ ions. It operates around a base pressure of 10^-8 torr. PC based interface is provided for sample analysis.

1. It is compact, reliable and high sensitivity analytical instrument, consisting of a sample inlet system, electron impact ion source, mass analyzer, faraday cup collectors.
2. Turbo molecular pump & ion pump makes the vacuum system.
3. It can analyze Water and gas samples.
4. Sample analysis is under computer control.
5. Its precision is ± 0.2 %.

1. It is used as quality assurance tool in Heavy water Plants.
2. For research & development in Heavy Water and Catalyst.
3. In isotope hydrology, for studying and interpreting the natural isotope variation in D/H in various natural waters.

The D/H Mass Spectrometer is a versatile analytical instrument. It is used for routine measurement of D/H (Deuterium/ Hydrogen) ratio in water and hydrogen sample. It consists of sample inlet system, electron impact ion source, analyzer and faraday cup collectors. The sample inlet system consists of online reduction system for water samples & an inlet system for gas samples. The electron impact ion source is designed to have high sensitivity and low H₃⁺ formation. The mass analyzer has a radius of 6 cm with deflection angle of 60°. Two independent collector assemblies have been incorporated to collect H₂⁺ and HD⁺ ions. It operates around a base pressure of 10^-8 torr. The vacuum system of it consists of rotary pump, turbo molecular pump and ion pump to achieve the vacuum of 10^-8 torr. PC based interface is provided for sample analysis.

1. It is used as quality assurance tool in Heavy water Plants (by the measurement of deuterium enrichment) also in research & development in Heavy Water and Catalyst.
2. It is also used in isotope hydrology for studying and interpreting the natural isotope variation in D/H in various natural waters.

SPECIFICATIONS

Sr. No.	Specification	Value
1	Range of samples	20 ppm to 10,000 ppm
2	Mass Range	2 & 3amu (H2 & HD)
3	Precision	± 0.2 %
4	Resolution	10
5	Sample Analysis Time	20 Minutes
6	Samples	Water, hydrogen gas

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Ion source

Source	Electron-Impact type
Ion optics	Two independent collectors assemblies to collect H2+ & HD+ ions

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Mass Analyzer

Analyzer deflection angle	60°
Radius of analyzer	6 cm (Central beam describes 6 cm radius)
Field	2000 gauss

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Vacuum System

Vacuum system	One turbo molecular & one ion pump
Roughing pump	Two rotary pumps

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INFRASTRUCTURE REQUIRED

1. Mechanical fabrication workshop with lathe machine, Milling machine, TIG welding, Insulation tester, access to leak testing facility.

Electronic Lab Facility for Testing Purpose

1. PCB assembly & instrument rack wiring facility.
2. Measuring instruments like precision digital multimeter & Oscilloscope.
3. Function Generator.

SPACE

1. A 100 sq. meter room

RAW MATERIAL

1. Most of the components are available within the country and some components need to be imported through local agents.

MANPOWER

1. One graduate in science, one electronics engineer, two trained technicians will be required for manufacture/production of this instrument.