design of the hatch of the instrument booth of euso-balloon version v1.2 writer : sylvie dagoret-...
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Final tests and Health tests 1
DESIGN OF THE HATCH OF THE INSTRUMENT BOOTH OF EUSO-BALLOON
version v1.2
Writer : SYLVIE DAGORET-CAMPAGNE
http://euso-balloon.lal.in2p3.fr/spip.php?article313
Final tests and Health tests 2
Purpose of the hatchThe hatch is a kind of box of 17 cm x 17 cm x 6 cm inside the top wall of the Instrument Booth.During final tests and health tests the electronics of the internal booth is connected to external equipment to shunt :• SIREN which may not be available• Batteries to spare the cellsLast checking tests are done to be sure the whole detector works as expected.
Hatch open
Final tests and Health tests 3
Hatch closed
• For the flight, the cables to external equipments are removed, SIREN is installed definitely inside the IB, the connectors are plugged with the terminal plugs, the hatch box is closed.
• The instrument works with SIREN and its own battery• The whole instrument booth (IB) has to be kept totally
watertight even if splash fall in water
Hatch closed
Final tests and Health tests 4
Cables having to pass through the hatch
• The cables from both side are connected through a series of feedthrough connectors passing through the wall of the hatch box.
• During the tests the active subsystems of IB are connected to the external equipments and for flight, the external cables are removed, the internal cables are kept in place and the feedthrough connectors inside the hatch box is ended by plugs.
Final tests and Health tests 5
List of feedthrough
name subsystem equipment type comment
LED Led Stabilised voltage supply
Lemo or BNC FS illumination
PM Anode Ext PM Scope Lemo or BNC Light leakage
PM HV Ext PM HV BNC
PDM-B PDM-B Int PC-USB-PDM USB2
CPU-ExtTrig CPU Trigger generator
Lemo or BNC
CPU-Eth CPU PC-Ethernet-CPU
DB9
SIREN-Eth SIREN DB9 In flightLoop back toward CPU-Eth
SIREN-RS232/422
SIREN DB9 In flight loop back HK RS422
SIREN-Open Drain
SIREN Lemo or BNC In flight loop back LVPS-HK
LVPS-HK Open Drain
LVPS-HK Signal generator ?TBC
Lemo or BNC
HK-RS422 HK PC-RS422-CPU DB9
PWP PWP 28 V Power supply
MicroSUBD25 Allow to switch between external geenrator and batteries
Motor Motor Motor Cpntrol SUBD25 TBD
6
LED
PDM-B NI
HATCH BOX
HATCH BOX
BNC BNC
USB USB
CPUExternal TrigEthernet DB9 DB9
DB9 DB9SIRENEthernet
RS232Open Drain
ComputerPDM Soft
LED Power supply
BNC BNC
plug
Ext Trig
ComputerDP Soft
DB9 DB9
LVPS-HKOpen Drain
RS232/RS422
DB9 DB9HKRS422
Instrument booth
BNC BNC
BNC BNC
plug
ComputerHK Soft
AnalogTurn ON
ExternalTest equipment
SUBD
-25
SUBD
-25Batteries
SUBD
-25
SUBD
-25
plug
ExternalPowerSupply28 V, 5 Amp
Motor SubD25 SubD25 Motor control
Ext PM BNC
SHV SHV
BNC
PM HV
Scope
7
LED
PDM-B NI
HATCH BOX
HATCH BOX
BNC BNC
USB USB
CPUExternal TrigEthernet DB9 DB9
DB9 DB9SIRENEthernet
RS232Open Drain
BNC BNCplug
DB9 DB9
LVPS-HKOpen Drain
RS232/RS422
DB9 DB9HKRS422
Instrument booth
BNC BNC
BNC BNC
plug
IN
Flight
SUBD
-25
SUBD
-25Batteries
SUBD
-25
SUBD
-25
Motor subD25 SubD25
Ext PM BNC
SHV SHV
BNCplug
Final tests and Health tests 8
Hatch Panel Design
Final tests and Health tests 9
BACKUP
Final tests and Health tests 10
LED
For Final Tests and Health Tests:
• This is to put a stabilised voltage for pulsing with photons the PDM FS.
• The feedthough has to be of good quality to avoid water entering inside the instrument.
• Integrating sphere optional
Final tests and Health tests 11
External PMT
For Final Tests :The purpose is to check there is no light leakage inside the Instrument booth.
• Need to feed the voltage divider by HV (BNC-SHV)
• Need to read the anode with lemo/BNC
May be kept in-situe for health test to check LED is pulsing correctly
Final tests and Health tests 12
PDM-B• This is to read the PDM-B directly on a PC to
perform special studies that shunt the DP.
• This is optional but probably usefull for debugging during final tests (not health tests).
• It is possible to select the Data Output of the PDM-B by a command from DP.
• This requires to have the NI inside the IB (instrument booth).
• The question is can we find a watertight USB plug for flight
Final tests and Health tests 13
CPU
Ethernet• To be watertight the usual RJ45
Ethernet connector will not be used. We should use a DB9 feedthrough.
• In Flight : A plug DB9 is used to loop back to SIREN Ethernet.
External Trigger• For final tests, like PDM-FS position
adjustment with a motor, the CPU-DAQ is triggered externally
• A BNC/lemo is proposed with the most watertight solution proposed.
Final tests and Health tests 14
HK
RS422 :
• We will use a DB9 feedthrough (watertight).
• In Flight : A plug DB9 is used to loop back to SIREN RS422/RS232.
Final tests and Health tests 15
LVPS-HK
• This is the port through which the instrument start to be turned on.
• This is an analog signal on open drain from a dedicated SIREN output.
• The proposed connection is through BNC/lemo (depending on watertightness)
• This connection is doubled to loop back from SIREN to LVPS HK during the flight
Final tests and Health tests 16
Motor
• DB25 connector is enough
Final tests and Health tests 17
Open points
• The hatch panel has still to be confirmed in the 15th meeting
• The choice of the feedthrough has to be done according compromises on:– Price/ connector quality– Full Water tightness for sea landing– Reusability during the same flight
campaign• No idea about the turn on off
HVPS ?