Sep 12 – 17, 2021
University of Birmingham
Europe/London timezone

The transmission dynode (tynode) vacuum electron multiplier

Sep 16, 2021, 8:05 AM
Teaching and Learning Building (University of Birmingham)

Teaching and Learning Building

University of Birmingham

Edgbaston Campus University of Birmingham B15 2TT UK
poster Position Sensitive Fast Timing Detectors Poster Session 4 (Position Sensitive Fast Timing Detectors)


Harry Van Der Graaf (Nikhef National institute for subatomic physics (NL))


With Atomic Layer Deposition (ALD) MEMS technology, thin multilayers have been realised which emit, after the absorption of an energetic electron at the top side, a multiple of secondary electrons at the bottom (emitting) side. In order to avoid charge-up effects, one of the layers has the function to replenish electrons and is therefore a conductor. With ALD MgO, a transmission secondary electron yield (TSEY) of 5.5 has been reached, enabling the single-electron sensitive Timed Photon Counter TipC in which a stack of 8 tynodes is placed on top of the TimePix3 or TimePix4 chip.
The alignment of 8 tynodes in a stack is obtained by applying grooves at both sides of a tynode: a glass wire in the groove is sandwiched between adjacent tynodes, locking their mutual 3D position.

Institute Nikhef & TU Delft
Title Prof
Nationality Dutch
Your name Harry van der Graaf

Primary author

Harry Van Der Graaf (Nikhef National institute for subatomic physics (NL))


Presentation materials