Monitoring of operating pressure

Particle Physics

The n2EDM project, conducted at the Paul Scherrer Institute in an international collaboration, searches for the neutron electric dipole moment of the (electrically neutral) neutron (nEDM).
The nEDM can be visualized by the distribution of positive and negative charge inside the neutron. If a non-zero-valued nEDM can be detected with the sensitivity targeted in the n2EDM experiment, it would mean that an important fundamental symmetry (charge-parity CP) in particle physics is violated. This might help to understand why less antimatter than expected exists in the Universe.
So far, however, astronomers have observed mainly normal matter.

Requirements

The working pressure in the helium container of the superconducting magnet, a polarization filter which only allows neutrons in one of the spin states to pass, must be monitored. The working pressure is supposed to be constantly retained at 1 psi (69 mbar) and must not drop under any circumstances.

Suitable Products

VD81: The reliable piezo vacuum meter measures absolute pressure in the rough vacuum range from 1600 to 1 mbar using a durable ceramic sensor, independent of the gas type.

VD810: The piezo vacuum meter with enhanced functions and features. A large display shows current measurement values and pressure graphs, and the 4+1 membrane keypad enables convenient menu navigation. The digital VD810, with an integrated data logger and USB-C interface, measures both absolute and relative pressure in the rough vacuum range using a robust ceramic sensor.

VSH: The digital vacuum transducer VSH with a combined Pirani and hot cathode sensor measures the entire range from atmospheric pressure to ultra-high vacuum. The integrated Pirani sensor ensures that the hot cathode is only activated at low pressure, which protects the sensor and significantly extends its lifespan.