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Electronic Log for Mechanical Engineering
Electronic Log for Mechanical Engineering
== 2025 Experiment ==
=== Components inside the box ===
1. 4x detector modules:
1.1 128 polished scintillator sheets of 100x100x3mm (32 x module)
1.2 132 mylar foil sheets of 100x100x0.006mm (1 at the beginning of each module + 1 after each scintillator)
1.3 4x scintillator holders
2. Electronics:
2.1 256 photodiodes (32 sheets x 4 modules x 2 sides)
2.2 8 DDC232 revE boards
2.3 1 x Zmod daughter board
2.4 1 x FPGA USB104
3. DAQ and cabling:
3.1 Raspberry pi5 for DAQ
3.2 8 usb C cables: 7 to daisy chain the scintillator modules + 1 for connection with Zmod
3.3 ?? Potential 7.5V external power supplier for Zmod board (we need to test if it can be powered directly by the FPGA from the Zmod connection or not)
3.4 5V power supply cable for FPGA
3.5 USB for FPGA-Raspberry pi connection
3.6 Power cable for raspberry pi5
3.7 Ethernet cable for pi5


== To Do ==
== To Do ==


=== Proton Therapy ===
# Scintillator stack holder redesign
 
# Scintillator machining
==== Preparation for UCLH beam tests 29-30th April ====
# Peli case scintillator module holder frame
 
# SciFi frame and holder
# '''New scintillator stack holders:'''
# Kria and carrier board installation in Peli 1510 case
#* Stack holders 3D printed: remake by hand if time allows.
# Alignment frame
#* Mounting plate to screw to Thorlabs optical breadboards in Peli cases:
# Cover/Alignment plates and markings
#** Rough version already 3D printed.
# Nozzle mount
#** Needs modifying to fix stack holder in place with M14(?) nuts.
#** Must be able to mount upside down.
#* New frame needed for patch panel with 50mm stand off to allow deeper connectors not to interfere with scintillator stacks.
# '''Holder for NPL Transmission Calorimeter:'''
#* TC needs to mount into Peli Case in front of stack holders.
#* CAD STEP-files already received from Sam Flynn (NPL) for existing holder.
#* If making new holder, exit pipe for electronics cabling needs to be shortened to fit in small Peli case.
#* If making holder for holder, must mount to Thorlabs optical breadboard (M6 holes on 25mm pitch?).
#* Centre of holder must be '''71 mm''' from baseplate (scintillator stacks are 50mm radius, plus 21mm offset from base).
# '''Holder for Birmingham Pixel Sensor:'''
#* '''Tony Price''' (Birmingham) has provided dimensions to '''HB'''.
#* Holder needed to support pixel sensor between TC and scintillators.
#* Peli case needs 100x10mm slot cut to left of side handle to allow sensor ribbon cable to pass through.
# '''Nozzle mount for detector enclosure:'''
#* Small Peli case needs to be nozzle-mounted for beam tests.
#* Dimensions already obtained from UCLH measurements:
#** '''SJ''' has contacted UCLH to check whether we can bypass light curtain.
#** Assume we can't and design to bypass mechanically...
#* 3 parts needed:
#** Nozzle mounting plate that sits inside nozzle using range modulator plate mounting slots.
#** U-bracket that slots in to this mounting plate — bypassing the light curtain — with a 40 x 30 cm hole for the beam to pass through.
#** Peli Case support that fixes to the U-bracket and holds the Peli Case whilst gantry is rotating.


==== May onwards ====
<s>'''Items 1–5 to be completed by end of May'''</s>


# '''Bari scintillating fibre holder:'''
'''Items 1–5 to be completed by 18th September'''
#* Bari are designing the scintillating fibre assembly for the '''QuADProBe'''.
#* Prototype fibre array holder machined from aluminium.
#* Clinical prototype ideally needs a version in plastic.
#* Review Bari CAD drawings and recommend suitable materials.
# '''Scintillator machining:'''
#* Promising results from Datron: chase up potential workshops who could machine scintillator for us.
#* Liaise with '''Martin Blackman''' in main workshop to assess quality of his scintillator machining.
#* Write case and obtain quote for us to purchase Datron Neo.


==== Full detector scintillator holder ====
=== Redesigned scintillator stack holders ===


* We need to go from the prototype version bolted to the optical plate to something completely standalone.  
* Moving from 2-sided to 4-sided readout
* We can probably put it in another Peli case — I have loads — initially with an optical breadboard but eventually without.
* Sheet thickness reduced from 3mm to 2.5mm
* It needs a support structure that is not rigidly bolted to the case but will align to any windows we cut: that means clinical staff can whack the detector and it won’t break or go out of alignment. So something internally sprung.
* Updating photodiodes from [https://www.hamamatsu.com/eu/en/product/optical-sensors/photodiodes/si-photodiodes/S12915-16R.html S12915-16R] single element photodiodes to [https://www.hamamatsu.com/eu/en/product/optical-sensors/photodiodes/si-photodiode-array/si-photodiode-array/S12362-021.html S12362-021] 16-element arrays.
* New DDC boards are H-shaped to accommodate updated USB-C cable routing and 4-sided photodiode arrays.  
* Redesigned stack holders need to accommodate thinner scintillator sheets &mdash; and therefore a reduction in stack thickness from &ge;96mm to &ge;80mm &mdash; with identical transverse dimensions of 100mm x 100mm.
* Mounting plate needed to interface with new Peli case support frame.


== Completed ==
=== Scintillator machining ===


=== 2023 ===
* Scintillator thickness needs to be reduced from 3mm to 2.5mm to accommodate photodiode spacing in new arrays.
* Injection moulded sheets do not have parallel large faces.
* Lower quality &ldquo;opaque&rdquo; sheets need surface finishing improved.
* Machine '''all''' sheets down to 2.5mm for new stacks.
* At least 128 sheets needed for 4&times;32-sheet modules.


; January-May : Enclosure design for small-scale Clatterbridge detector prototype (with Simon).
=== Peli case scintillator module holder frame ===
:* Includes feedthroughs, mounts for NUC PC, Raspberry Pi and USB104 FPGA.
:* Nozzle mounted


=== 2022 ===
* Change QuARC module and SciFi mounting system in Peli case to make modules easier to install and remove.
* Raise support rails from the base of the Peli case to approximately level with the lid hinges.
* Keep shock absorber mounts in base to retain vibration isolation.
* Include mounts for new Kria box: mount under rails but with USB-C connectors visible.
* Include mount points for nozzle mount.
* Rigid mechanical structure needed with fixed mount points for travel plus adjustable fixation for calibration test removal.


; November-December : Design and 3D print external frame with alignment marks and alignment plates for small Peli case.
=== SciFi frame and holder ===
: Duplicate alignment bar from Zarges case with circular studs to allow alignment with treatment couch.


; October : Modified medium-sized Peli case ready for beam tests:
* X and Y scintillating fibre arrays already mounted into frame.
:* Install Thorlabs optical breadboard in base of case.
* New mounting plate needed to match new support rails.  
:* Cut out window at each end of case for mylar window installation.  
* Front-end interface boards for new Hamamatsu S17285 photodiode arrays coming from '''Pete Hastings''' (Oxford): will need mounting on top of S17285.
:* Cut out 2 windows for 2-gang patch panels, 1 per side.
:* Cut out 2 windows for 1-gang patch panels, 1 per end.
:* 3D print internal frames for mylar windows with bolt holes in each corner. Drill bolt holes in Peli case.
:* 3D print external frame with alignment marks matching centre line of optical breadboard (vertical) and 71mm above optical breadboard (horizontal). Match bolt holes to mylar window frames.
:* 3D print alignment plates that are strong enough to double as external cover plates when shipping enclosure.


; September : Machine a patch panel complete with 10 smaller panels that can be swapped between on the main patch panel to allow for various electrical feedthroughs
=== Kria and carrier board installation in Peli 1510 case ===


; August : Created CAD cross hair for Peli Case to be printed. Also created small printed windows to clamp Mylar smooth over the beam entry point.
* Kria carrier board designed around specific case.
* Case needs mount points underneath scintillator module rails.  
* Ensure USB-C sockets are accessible outside rails.


; July : Created CAD models for internal components including:
=== Alignment frame ===
:* Scintillator holder.
:* 2x Side Vice faces.
:* 1x Front Vice face.
:* Cover for beam entry point.
: These were printed soon after.
: Beam entry point was cut out of the case, piece was sent for testing with Adam Gibson.
: Machined two special 1/4-20 UNC screws for camera mount.
: Tapped all holes on Scintillator holder to take m5 nylon screws to allow vice faces to travel.


; June : Initiated design of large Peli Case. Received Lab scissor jack used to mount camera.
* Previous beam measurements have indicated misalignment between cover plate markings and in-room lasers.
* Frame needed to sit outside Peli case that aligns with cover plate markings.
* Frame should be placed over Peli case to check alignment markings.  
* Frame should be free-standing to sit on couch to check alignment.  


; May : CAD Prototype a sliding system to mount multiple scintillator holders into a case
=== Cover/Alignment plates and markings ===


; February : Create CAD model for small Peli Case so ideas on how to install the holder into the case can be prototyped
* Cover plates need enlarging to cover larger entry/exit windows.
* Make cover plates out of thinner material so that they don't have to be removed.
* Add precision marking to box lid to ease in-room alignment.


=== 2021 ===
=== Nozzle mount for detector enclosure ===


; November : Design initial prototype of a new holder that will clamp scintillator sheets together. Will supersede previous adhesive idea
* Small Peli case needs to be nozzle-mounted for beam tests.
; June : Prepare scintillator sheets to be adhered together using standard primer
* '''SJ''' in contact with Prague/IBA for mounting points for Prague-IBA nozzle.
* Dimensions already obtained from UCLH measurements:
** '''SJ''' has contacted UCLH to check whether we can bypass light curtain.
** Assume we can't and design to bypass mechanically...
* 3 parts needed:
*# Nozzle mounting plate that sits inside nozzle using range modulator plate mounting slots.
*# U-bracket that slots in to this mounting plate &mdash; bypassing the light curtain &mdash; with a 40 x 30 cm hole for the beam to pass through.
*# Peli Case support that fixes to the U-bracket and holds the Peli Case whilst gantry is rotating.

Latest revision as of 17:54, 5 August 2026

Electronic Log for Mechanical Engineering

To Do

  1. Scintillator stack holder redesign
  2. Scintillator machining
  3. Peli case scintillator module holder frame
  4. SciFi frame and holder
  5. Kria and carrier board installation in Peli 1510 case
  6. Alignment frame
  7. Cover/Alignment plates and markings
  8. Nozzle mount

Items 1–5 to be completed by end of May

Items 1–5 to be completed by 18th September

Redesigned scintillator stack holders

  • Moving from 2-sided to 4-sided readout
  • Sheet thickness reduced from 3mm to 2.5mm
  • Updating photodiodes from S12915-16R single element photodiodes to S12362-021 16-element arrays.
  • New DDC boards are H-shaped to accommodate updated USB-C cable routing and 4-sided photodiode arrays.
  • Redesigned stack holders need to accommodate thinner scintillator sheets — and therefore a reduction in stack thickness from ≥96mm to ≥80mm — with identical transverse dimensions of 100mm x 100mm.
  • Mounting plate needed to interface with new Peli case support frame.

Scintillator machining

  • Scintillator thickness needs to be reduced from 3mm to 2.5mm to accommodate photodiode spacing in new arrays.
  • Injection moulded sheets do not have parallel large faces.
  • Lower quality “opaque” sheets need surface finishing improved.
  • Machine all sheets down to 2.5mm for new stacks.
  • At least 128 sheets needed for 4×32-sheet modules.

Peli case scintillator module holder frame

  • Change QuARC module and SciFi mounting system in Peli case to make modules easier to install and remove.
  • Raise support rails from the base of the Peli case to approximately level with the lid hinges.
  • Keep shock absorber mounts in base to retain vibration isolation.
  • Include mounts for new Kria box: mount under rails but with USB-C connectors visible.
  • Include mount points for nozzle mount.
  • Rigid mechanical structure needed with fixed mount points for travel plus adjustable fixation for calibration test removal.

SciFi frame and holder

  • X and Y scintillating fibre arrays already mounted into frame.
  • New mounting plate needed to match new support rails.
  • Front-end interface boards for new Hamamatsu S17285 photodiode arrays coming from Pete Hastings (Oxford): will need mounting on top of S17285.

Kria and carrier board installation in Peli 1510 case

  • Kria carrier board designed around specific case.
  • Case needs mount points underneath scintillator module rails.
  • Ensure USB-C sockets are accessible outside rails.

Alignment frame

  • Previous beam measurements have indicated misalignment between cover plate markings and in-room lasers.
  • Frame needed to sit outside Peli case that aligns with cover plate markings.
  • Frame should be placed over Peli case to check alignment markings.
  • Frame should be free-standing to sit on couch to check alignment.

Cover/Alignment plates and markings

  • Cover plates need enlarging to cover larger entry/exit windows.
  • Make cover plates out of thinner material so that they don't have to be removed.
  • Add precision marking to box lid to ease in-room alignment.

Nozzle mount for detector enclosure

  • Small Peli case needs to be nozzle-mounted for beam tests.
  • SJ in contact with Prague/IBA for mounting points for Prague-IBA nozzle.
  • Dimensions already obtained from UCLH measurements:
    • SJ has contacted UCLH to check whether we can bypass light curtain.
    • Assume we can't and design to bypass mechanically...
  • 3 parts needed:
    1. Nozzle mounting plate that sits inside nozzle using range modulator plate mounting slots.
    2. U-bracket that slots in to this mounting plate — bypassing the light curtain — with a 40 x 30 cm hole for the beam to pass through.
    3. Peli Case support that fixes to the U-bracket and holds the Peli Case whilst gantry is rotating.
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