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The present project proposes to study the feasibility of PoF in extreme conditions, using commercial components. In the first phase, we will set up a lab space with the necessary engineering controls to lower the safety classification of the required class 4 laser to a class 1. Then the receiver will be characterized at cryogenic temperatures (down to 77 K). By adding a power storage capacitor and an LDO regulator, this setup can be used to power an ASIC with a power-pulsing scheme, or a low-power digital SiPM. We will collaborate with universities for the aforementioned. Finally, we will work with national and international collaborators, and will investigate the possibility of characterizing the photodiode with respect to different irradiation doses compatible with e+e- colliders (> 100 krad).
Specifications - Laser
Image Removed laser diagram from Bill Pellicolaser with housing: https://www.digikey.com/en/products/detail/broadcom-limited/AFBR-POMEK2204/15928069?s=N4IgTCBcDaIIIDEBCAlAtABQPIFkCiA0mGAAwAsIAugL5A
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EIC_R_D_2023_Mandal.pdf
Meeting Minutes
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| title | Meeting February 14, 2024 |
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Zoom: https://stanford.zoom.us/j/6723568666?pwd=eGxoSEs0ODc2UDdjL0NWR3RNSUZ3dz09
after discussing with Alex, my suggestion for the agenda is:
1. Thanking Alex for his work!, discussing new PI role, discussing what we need for the smoothest transition
2. Information gained from talk to Bill Pellico from Fermilab
3. Information gained from attending POF Fermilab meeting (David Martinez Caicedo)
4. Updated idea on cryogenic setup (reusing open LN2 duwar)
5. Discuss proposal for redistribution of hours
6. Discuss possible summer student opportunities: SULI UG, Stanford UG, direct hire from University grad, GEM fellow grad
7. Quick prep for safety meeting this afternoon
8. Any other updates/business? (edited) laser diagram from Bill Pellico
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| title | Meeting 25 January 2023 |
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- Sander is progressing on the safety procedures. He had some technical questions that were answered by the group.
- Marty has some technical questions regarding the diode. Alex should check the MAPS excel sheet and propose a technical meeting with Marty.
- Pietro made a first design for the PCB. The group made the following suggestions:
- The diode should be off the board, inside the sealed box. We could have a connecter that allows us to easily connect/disconnect the diode
We should foresee a power pulsing scheme with a MHz range. More precisely: the load consumes most of the stored power within 1 us, with a 120 Hz repetition frequency. To be foreseen: power storage capacitor, switches controlled at 1MHz, and deal with the case where the average input power is not equal to the average consumed power. Provide probing pins for easy monitoring on oscilloscope Think about the case where the diode would operate on a floating ground for TPC operation (not necessarily implemented in this iteration) Provide key, interlock, light diode (green/red) for the sealed box
- We need to design the 80/20 box (James would sketch one?)
Alex showed the initial Smartsheet planning, which was modified according to the group's suggestions. Objective: Have a first laser by April 1st, with Safety Ok, and PCB ready. For a more detailed planning please visit the Smartsheet page:
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