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# Nozzle mount
# Nozzle mount


'''Items 1–5 to be completed by 18th September'''</s>
<s>'''Items 1–5 to be completed by end of May'''</s>


<s>'''Items 1–5 to be completed by end of May'''</s>
'''Items 1–5 to be completed by 18th September'''


=== Redesigned scintillator stack holders ===
=== Redesigned scintillator stack holders ===
Line 38: Line 38:
* Raise support rails from the base of the Peli case to approximately level with the lid hinges.  
* 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.  
* 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.  
=== Modifications to Peli 1510 case after Prague/UCLH ===
* Rigid mechanical structure needed with fixed mount points for travel plus adjustable fixation for calibration test removal.
 
Order of priority:
 
# Wheel holders. > Designing
# Lowered scintillator stack rail cross braces to reduce stack height to match alignment plates. > sent to workshop, it should lower the stack by 5mm
# End face studs to allow Peli case to stand vertically. > will do once wheel holder are done
# Lid rails for electronics. > not started
# Alignment plate positioning.
# Prague nozzle mount
 
Aim for 1–4 in time for Trento beam test commencing '''28th September'''.
 
==== Wheels & Mobility (Zarges) ====
 
===== Redesign Wheel Fitting Mechanism =====
 
* The current bolt/axle slot is poorly suited for removal (too big/shallow).
* Explore improved methods for wheel installation, removal, and securement.
 
===== Wheel Holders =====
 
* Wheel holders from the Zarges case are currently located on my desk.
* Redesign and reprint parts to fit beneath the Peli case and support the Zarges mechanism.


==== Peli Case Modifications ====
=== SciFi frame and holder ===


===== Alignment Plates =====
* 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.


* Alignment plates appear to sit at different heights, possibly due to misaligned bolt holes.
=== Kria and carrier board installation in Peli 1510 case ===
* The issue may be caused by new wheel holder prints making one side sit higher.
* Investigate options:
*# Redrill bolt holes 
*# Create wider plates to match the Peli case lip 
*# Design improved alignment plates


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


* Add markings on the case to align with cover plate positions.
=== Alignment frame ===
* Intended to ease module removal and reinstallation.
* Note: This is challenging with the Peli case design.


==== Thermal & Mechanical Concerns ====
* 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.


===== Raspberry Pi Heat =====
=== Cover/Alignment plates and markings ===


* The case exhibits poor airflow.
* Cover plates need enlarging to cover larger entry/exit windows.  
* Consider adding ventilation while maintaining:
* Make cover plates out of thinner material so that they don't have to be removed.
*# Light-tightness 
* Add precision marking to box lid to ease in-room alignment.
*# Structural integrity 
 
===== Module Height & Pi Proximity =====
 
* Module 4 is too close to the Raspberry Pi and was warm after the beam test.
* Redesign crossbars to:
*# Lower the overall stack height 
*# Improve thermal spacing


=== Nozzle mount for detector enclosure ===
=== Nozzle mount for detector enclosure ===
Line 109: Line 78:
*# 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.
*# 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.
*# Peli Case support that fixes to the U-bracket and holds the Peli Case whilst gantry is rotating.
=== New scintillator stack holders ===
# Stack holders 3D printed: remake by hand if time allows.
# Mounting plate to screw to Thorlabs optical breadboards in Peli cases:
#* Rough version already 3D printed.
#* 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 ====
'''Unlikely this will ever be needed'''
* '''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.
=== Scintillator Machining ===
# '''Bari scintillating fibre holder:'''
#* 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.
=== Long Term ===
== Completed ==
=== 2025 ===
=== 2024 ===
=== 2023 ===
; January-May : Enclosure design for small-scale Clatterbridge detector prototype (with Simon).
:* Includes feedthroughs, mounts for NUC PC, Raspberry Pi and USB104 FPGA.
:* Nozzle mounted
=== 2022 ===
; November-December : Design and 3D print external frame with alignment marks and alignment plates for small Peli case.
: 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:
:* Install Thorlabs optical breadboard in base of case.
:* Cut out window at each end of case for mylar window installation.
:* 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
; 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.
; July : Created CAD models for internal components including:
:* 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.
; May : CAD Prototype a sliding system to mount multiple scintillator holders into a case
; February : Create CAD model for small Peli Case so ideas on how to install the holder into the case can be prototyped
=== 2021 ===
; November : Design initial prototype of a new holder that will clamp scintillator sheets together. Will supersede previous adhesive idea
; June : Prepare scintillator sheets to be adhered together using standard primer

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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