ELogs/MechanicalEngineering - Revision history

SimonJolly: /* To Do */

2026-03-30T17:06:25Z

To Do

← Older revision		Revision as of 17:06, 30 March 2026
Line 6:		Line 6:
	# Scintillator machining		# Scintillator machining
	# Peli case scintillator module holder frame		# Peli case scintillator module holder frame
			# SciFi frame and holder
	# Kria and carrier board installation in Peli 1510 case		# Kria and carrier board installation in Peli 1510 case
	# Alignment frame		# Alignment frame
	~~# SciFi frame and holder~~
	# Cover/Alignment plates and markings		# Cover/Alignment plates and markings
	# Nozzle mount		# Nozzle mount

	'''Items ~~1–4~~ to be completed by end of May'''		'''Items 1–5 to be completed by end of May'''

	=== Redesigned scintillator stack holders ===		=== Redesigned scintillator stack holders ===
Line 19:		Line 19:
	* Sheet thickness reduced from 3mm to 2.5mm		* Sheet thickness reduced from 3mm to 2.5mm
	* 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.		* 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 — and therefore a reduction in stack thickness from ≥96mm to ≥80mm — with identical transverse dimensions of 100mm x 100mm.

			=== 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.

	=== Modifications to Peli 1510 case after Prague/UCLH ===		=== Modifications to Peli 1510 case after Prague/UCLH ===

SimonJolly: /* To Do */

2026-03-30T14:57:17Z

To Do

← Older revision		Revision as of 14:57, 30 March 2026
Line 3:		Line 3:
	== To Do ==		== To Do ==

	~~'''To be completed by end of May'''~~		# Scintillator stack holder redesign
			# Scintillator machining
			# Peli case scintillator module holder frame
			# Kria and carrier board installation in Peli 1510 case
			# Alignment frame
			# SciFi frame and holder
			# Cover/Alignment plates and markings
			# Nozzle mount

	~~=== Redesigned Scintillator stack holders ===~~		'''Items 1–4 to be completed by end of May'''

	# Moving from 2-sided to 4-sided readout		=== Redesigned scintillator stack holders ===
	# Sheet thickness reduced from 3mm to 2.5mm
	# Updating photodiodes from 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.		* Moving from 2-sided to 4-sided readout
			* Sheet thickness reduced from 3mm to 2.5mm
			* 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.
			*

	=== Modifications to Peli 1510 case after Prague/UCLH ===		=== Modifications to Peli 1510 case after Prague/UCLH ===

SimonJolly: /* To Do */

2026-03-30T14:52:08Z

To Do

← Older revision		Revision as of 14:52, 30 March 2026
Line 2:		Line 2:

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

			'''To be completed by end of May'''

			=== 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 [https://www.hamamatsu.com/eu/en/product/optical-sensors/photodiodes/si-photodiode-array/si-photodiode-array/S12362-021.html S12362-021] 16-element arrays.

	=== Modifications to Peli 1510 case after Prague/UCLH ===		=== Modifications to Peli 1510 case after Prague/UCLH ===
Line 111:		Line 119:

	=== Long Term ===		=== Long Term ===



	== Completed ==		== Completed ==

HarryBarnett: /* Modifications to Peli 1510 case after Prague/UCLH */

2025-07-29T14:26:17Z

Modifications to Peli 1510 case after Prague/UCLH

← Older revision		Revision as of 14:26, 29 July 2025
Line 7:		Line 7:
	Order of priority:		Order of priority:

	# Wheel holders.		# Wheel holders. > Designing
	# Lowered scintillator stack rail cross braces to reduce stack height to match alignment plates.		# 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.		# End face studs to allow Peli case to stand vertically. > will do once wheel holder are done
	# Lid rails for electronics.		# Lid rails for electronics. > not started
	# Alignment plate positioning.		# Alignment plate positioning.
	# Prague nozzle mount		# Prague nozzle mount

SimonJolly at 12:59, 29 July 2025

2025-07-29T12:59:51Z

← Older revision		Revision as of 12:59, 29 July 2025
Line 14:		Line 14:
	# Prague nozzle mount		# Prague nozzle mount

	Aim for ~~1–3~~ in time for Trento beam test commencing '''28th September'''.		Aim for 1–4 in time for Trento beam test commencing '''28th September'''.

	==== Wheels & Mobility (Zarges) ====		==== Wheels & Mobility (Zarges) ====

SimonJolly at 12:58, 29 July 2025

2025-07-29T12:58:16Z

← Older revision		Revision as of 12:58, 29 July 2025
Line 9:		Line 9:
	# Wheel holders.		# Wheel holders.
	# Lowered scintillator stack rail cross braces to reduce stack height to match alignment plates.		# Lowered scintillator stack rail cross braces to reduce stack height to match alignment plates.
			# End face studs to allow Peli case to stand vertically.
	# Lid rails for electronics.		# Lid rails for electronics.
	# Alignment plate positioning.		# Alignment plate positioning.

SimonJolly at 18:42, 23 July 2025

2025-07-23T18:42:54Z

← Older revision		Revision as of 18:42, 23 July 2025
Line 13:		Line 13:
	# Prague nozzle mount		# Prague nozzle mount

	Aim for ~~1--3~~ in time for Trento beam test commencing '''28th September'''.		Aim for 1–3 in time for Trento beam test commencing '''28th September'''.

	==== Wheels & Mobility (Zarges) ====		==== Wheels & Mobility (Zarges) ====

SimonJolly at 18:28, 23 July 2025

2025-07-23T18:28:47Z

← Older revision		Revision as of 18:28, 23 July 2025
Line 4:		Line 4:

	=== Modifications to Peli 1510 case after Prague/UCLH ===		=== Modifications to Peli 1510 case after Prague/UCLH ===

			Order of priority:

			# Wheel holders.
			# Lowered scintillator stack rail cross braces to reduce stack height to match alignment plates.
			# Lid rails for electronics.
			# Alignment plate positioning.
			# Prague nozzle mount

			Aim for 1--3 in time for Trento beam test commencing '''28th September'''.

	==== Wheels & Mobility (Zarges) ====		==== Wheels & Mobility (Zarges) ====

	===== Redesign Wheel Fitting Mechanism =====		===== 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.		* 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 =====
	:* 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.		* 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 ====		==== Peli Case Modifications ====

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

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

	==== Thermal & Mechanical Concerns ====		==== Thermal & Mechanical Concerns ====

	===== Raspberry Pi Heat =====		===== Raspberry Pi Heat =====
	:* The case exhibits poor airflow.
	:* Consider adding ventilation while maintaining:		* The case exhibits poor airflow.
	::** Light-tightness		* Consider adding ventilation while maintaining:
	::** Structural integrity		*# Light-tightness
			*# Structural integrity

	===== Module Height & Pi Proximity =====		===== 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~~

	# '''~~New scintillator stack holders~~:'''		* Module 4 is too close to the Raspberry Pi and was warm after the beam test.
	#* Stack holders 3D printed: remake by hand if time allows.		* Redesign crossbars to:
	#* Mounting plate to screw to Thorlabs optical breadboards in Peli cases:		*# Lower the overall stack height
	#** Rough version already 3D printed.		*# Improve thermal spacing
	#** Needs modifying to fix stack holder in place with M14(?) nuts.
	#** Must be able to mount upside down.		=== Nozzle mount for detector enclosure ===
	#* 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~~:'''~~		* Small Peli case needs to be nozzle-mounted for beam tests.
	#* TC needs to mount into Peli Case in front of stack holders.		* '''SJ''' in contact with Prague/IBA for mounting points for Prague-IBA nozzle.
	#* CAD STEP-files already received from Sam Flynn (NPL) for existing holder.		* Dimensions already obtained from UCLH measurements:
	#* If making new holder, exit pipe for electronics cabling needs to be shortened to fit in small Peli case.		** '''SJ''' has contacted UCLH to check whether we can bypass light curtain.
	#* If making holder for holder, must mount to Thorlabs optical breadboard (M6 holes on 25mm pitch?).		** Assume we can't and design to bypass mechanically...
	#* Centre of holder must be '''71 mm''' from baseplate (scintillator stacks are 50mm radius, plus 21mm offset from base).		* 3 parts needed:
	~~# '''~~Holder for Birmingham Pixel Sensor:'''		*# Nozzle mounting plate that sits inside nozzle using range modulator plate mounting slots.
	#* '''Tony Price''' (Birmingham) has provided dimensions to '''HB'''.		*# 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.
	#* Holder needed to support pixel sensor between TC and scintillators.		*# Peli Case support that fixes to the U-bracket and holds the Peli Case whilst gantry is rotating.
	#* Peli case needs 100x10mm slot cut to left of side handle to allow sensor ribbon cable to pass through.
	~~# '''Nozzle mount for detector enclosure:'''~~		=== New scintillator stack holders ===
	~~#* Small Peli case needs to be nozzle-mounted for beam tests.~~
	~~#* Dimensions already obtained from UCLH measurements:~~		# Stack holders 3D printed: remake by hand if time allows.
	~~#** '''SJ''' has contacted UCLH to check whether we can bypass light curtain.~~		# Mounting plate to screw to Thorlabs optical breadboards in Peli cases:
	~~#** Assume we can't and design to bypass mechanically...~~		#* Rough version already 3D printed.
	~~#* 3 parts needed:~~		#* Needs modifying to fix stack holder in place with M14(?) nuts.
	~~#** Nozzle mounting plate that sits inside nozzle using range modulator plate mounting slots.~~		#* Must be able to mount upside down.
	~~#** 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.~~		# New frame needed for patch panel with 50mm stand off to allow deeper connectors not to interfere with scintillator stacks.
	~~#** Peli Case support that fixes to the U-bracket and holds the Peli Case whilst gantry is rotating~~.
			==== 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 ===		=== Scintillator Machining ===

HarryBarnett at 15:31, 2 July 2025

2025-07-02T15:31:54Z

← Older revision		Revision as of 15:31, 2 July 2025
Line 7:		Line 7:
	==== Wheels & Mobility (Zarges) ====		==== Wheels & Mobility (Zarges) ====

	:===== Redesign Wheel Fitting Mechanism =====		===== Redesign Wheel Fitting Mechanism =====
	:* The current bolt/axle slot is poorly suited for removal (too big/shallow).		:* The current bolt/axle slot is poorly suited for removal (too big/shallow).
	:* Explore improved methods for wheel installation, removal, and securement.		:* Explore improved methods for wheel installation, removal, and securement.

	:===== Wheel Holders =====		===== Wheel Holders =====
	:* Wheel holders from the Zarges case are currently located on my desk.		:* 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.		:* Redesign and reprint parts to fit beneath the Peli case and support the Zarges mechanism.
Line 17:		Line 17:
	==== Peli Case Modifications ====		==== Peli Case Modifications ====

	:===== Alignment Plates =====		===== Alignment Plates =====
	:* Alignment plates appear to sit at different heights, possibly due to misaligned bolt holes.		:* Alignment plates appear to sit at different heights, possibly due to misaligned bolt holes.
	:* The issue may be caused by new wheel holder prints making one side sit higher.		:* The issue may be caused by new wheel holder prints making one side sit higher.
Line 25:		Line 25:
	::** Design improved alignment plates		::** Design improved alignment plates

	:===== Box Markings =====		===== Box Markings =====
	:* Add markings on the case to align with cover plate positions.		:* Add markings on the case to align with cover plate positions.
	:* Intended to ease module removal and reinstallation.		:* Intended to ease module removal and reinstallation.
Line 32:		Line 32:
	==== Thermal & Mechanical Concerns ====		==== Thermal & Mechanical Concerns ====

	:===== Raspberry Pi Heat =====		===== Raspberry Pi Heat =====
	:* The case exhibits poor airflow.		:* The case exhibits poor airflow.
	:* Consider adding ventilation while maintaining:		:* Consider adding ventilation while maintaining:
	::** Light-tightness		::** Light-tightness
	::** Structural integrity		::** Structural integrity
	~~:* (Note: "Light-tight" and "ventilation" are typically at odds.)~~

	:===== Module Height & Pi Proximity =====		===== Module Height & Pi Proximity =====
	:* Module 4 is too close to the Raspberry Pi and was warm after the beam test.		:* Module 4 is too close to the Raspberry Pi and was warm after the beam test.
	:* Redesign crossbars to:		:* Redesign crossbars to:

HarryBarnett at 15:30, 2 July 2025

2025-07-02T15:30:52Z

← Older revision		Revision as of 15:30, 2 July 2025
Line 7:		Line 7:
	==== Wheels & Mobility (Zarges) ====		==== Wheels & Mobility (Zarges) ====

	===== Redesign Wheel Fitting Mechanism =====		:===== Redesign Wheel Fitting Mechanism =====
	* The current bolt/axle slot is poorly suited for removal (too big/shallow).		:* The current bolt/axle slot is poorly suited for removal (too big/shallow).
	* Explore improved methods for wheel installation, removal, and securement.		:* Explore improved methods for wheel installation, removal, and securement.

	===== Wheel Holders =====		:===== Wheel Holders =====
	* Wheel holders from the Zarges case are currently located on my desk.		:* 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.		:* Redesign and reprint parts to fit beneath the Peli case and support the Zarges mechanism.

	==== Peli Case Modifications ====		==== Peli Case Modifications ====

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

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

	==== Thermal & Mechanical Concerns ====		==== Thermal & Mechanical Concerns ====

	===== Raspberry Pi Heat =====		:===== Raspberry Pi Heat =====
	* The case exhibits poor airflow.		:* The case exhibits poor airflow.
	* Consider adding ventilation while maintaining:		:* Consider adding ventilation while maintaining:
	** Light-tightness		::** Light-tightness
	** Structural integrity		::** Structural integrity
	* (Note: "Light-tight" and "ventilation" are typically at odds.)		:* (Note: "Light-tight" and "ventilation" are typically at odds.)

	===== Module Height & Pi Proximity =====		:===== Module Height & Pi Proximity =====
	* Module 4 is too close to the Raspberry Pi and was warm after the beam test.		:* Module 4 is too close to the Raspberry Pi and was warm after the beam test.
	* Redesign crossbars to:		:* Redesign crossbars to:
	** Lower the overall stack height		::** Lower the overall stack height
	** Improve thermal spacing		::** Improve thermal spacing

	# '''New scintillator stack holders:'''		# '''New scintillator stack holders:'''