N. Voumard, AB-BT-ECN. Voumard, AB-BT-EC LBDS Audit, CERN 2008LBDS Audit, CERN 2008 11

LBDSLBDSTrigger Signal DistributionTrigger Signal Distribution

Trigger Synchronization Unit (TSU)Trigger Synchronization Unit (TSU)

Trigger Fan Out (TFO)Trigger Fan Out (TFO)

Power Trigger Unit (PTU)Power Trigger Unit (PTU)

Alain AntoineJean-Louis BretinEtienne CarlierNicolas Voumard

22N. Voumard, AB-BT-ECN. Voumard, AB-BT-EC LBDS Audit, CERN 2008LBDS Audit, CERN 2008

Overview of the LBDS triggering systemOverview of the LBDS triggering systemThe triggering system of the LBDS is cross-redundantThe triggering system of the LBDS is cross-redundant

Each Trigger Fan Out (TFO) is connected to the two Trigger Synchronization Unit (TSU)Each Trigger Fan Out (TFO) is connected to the two Trigger Synchronization Unit (TSU) Each of the Power Trigger Unit (PTU) is connected to the two TFO.Each of the Power Trigger Unit (PTU) is connected to the two TFO. There are two PTU pro extraction kicker and one pro dilution kicker.There are two PTU pro extraction kicker and one pro dilution kicker.

TFO A

TFO B

TSU A

TSU B

MKD 2

MKD 3

MKBV 4

MKBV 5

MKBV 6

MKD 1

IN A

IN B

IN A

IN B

1

RING 1 or 2

PTU A

PTU B

Trigger

Beam sync

Trigger

Beam sync

Kickers Generators

PTU A

PTU B

PTU A

PTU B

PTU

PTU

PTU

2

345

6

40

39

38

7

8

12

345

6

40

39

38

7

8

15x MKD

10x MKB

33N. Voumard, AB-BT-ECN. Voumard, AB-BT-EC LBDS Audit, CERN 2008LBDS Audit, CERN 2008

Power Trigger Unit (PTU)Power Trigger Unit (PTU)The PTU inputsThe PTU inputs

The PTU is composed of two Power trigger Modules (PTM) in parallel, (the trigger The PTU is composed of two Power trigger Modules (PTM) in parallel, (the trigger reception circuit is shown below)reception circuit is shown below)

Two trigger inputs from Trigger Fan OutTwo trigger inputs from Trigger Fan Out One soft trigger input from PLC via the Power Trigger Controller card (PTC).One soft trigger input from PLC via the Power Trigger Controller card (PTC). Two retrigger inputs via the retrigger line. Two retrigger inputs via the retrigger line. All five inputs are 15V, 50 Ohms terminatedAll five inputs are 15V, 50 Ohms terminated

The high voltage part of the PTU will not be covered hereThe high voltage part of the PTU will not be covered here

MKD generator trigger input

44N. Voumard, AB-BT-ECN. Voumard, AB-BT-EC LBDS Audit, CERN 2008LBDS Audit, CERN 2008

Power Trigger Unit (PTU)Power Trigger Unit (PTU)The delays between the Trigger Fan Out and the generators are adjusted:The delays between the Trigger Fan Out and the generators are adjusted:

With delay lines in the Trigger Fan Out (differences between TFO outputs).With delay lines in the Trigger Fan Out (differences between TFO outputs). With the cable length (time of flight between magnets).With the cable length (time of flight between magnets). With delay lines in the generators before the PTU using the Trigger Pulse Delay With delay lines in the generators before the PTU using the Trigger Pulse Delay

card shown below (differences between generators switching time).card shown below (differences between generators switching time).

Trigger Pulse Delay (TPD) card

55N. Voumard, AB-BT-ECN. Voumard, AB-BT-EC LBDS Audit, CERN 2008LBDS Audit, CERN 2008

Trigger Fan OutTrigger Fan OutThe Trigger Fan Out (TFO) crate is divided in three different partsThe Trigger Fan Out (TFO) crate is divided in three different parts

The receiver part ; the Trigger Fan Out Receiver (TFOR)The receiver part ; the Trigger Fan Out Receiver (TFOR)1 card in crate1 card in crateReceives two pulses from the Trigger Synchronization UnitReceives two pulses from the Trigger Synchronization UnitDistributes these two pulses to the Trigger Fan Out TransceiversDistributes these two pulses to the Trigger Fan Out Transceivers

The emitter part ; the Trigger Fan Out Transceiver (TFOT) The emitter part ; the Trigger Fan Out Transceiver (TFOT) 6 cards in crate6 cards in crateReceives two pulses from the TFOR and sends it to eight outputsReceives two pulses from the TFOR and sends it to eight outputs

The power supplyThe power supply

TFOR TFOT 1 TFOT 2 TFOT 3 TFOT 4

Presence Presence

OUT 1, 2

OUT 3, 4

OUT 5, 6

OUT 7, 8

Dump trigger 1, 2

Dump trigger 3,4

Input 1

Input 2

Tri

gg

er F

an O

ut

(TF

O)

TFOT 5

Presence

OUT 1, 2

OUT 3, 4

OUT 5, 6

OUT 7, 8

Presence

OUT 1, 2

OUT 3, 4

OUT 5, 6

OUT 7, 8

Presence

OUT 1, 2

OUT 3, 4

OUT 5, 6

OUT 7, 8

Presence

OUT 1, 2

OUT 3, 4

OUT 5, 6

OUT 7, 8

POWER

+15 V

TFOT 6

Presence

OUT 1, 2

OUT 3, 4

OUT 5, 6

OUT 7, 8

From TSU 1

From TSU 2

From TSU 1

From TSU 2

MKD 1

MKD 2

MKD 3

MKD 4

MKD 5

MKD 6

MKD 7

MKD 8

MKD 9

MKD 10

MKD 11

MKD 12

MKD 13

MKD 14

MKD 15

MKBH 1MKBH 2

MKBH 3MKBH 4

MKBV 1MKBV 2

MKBV 3MKBV 4

MKBV 5MKBV 6

AB-BT-EC

66N. Voumard, AB-BT-ECN. Voumard, AB-BT-EC LBDS Audit, CERN 2008LBDS Audit, CERN 2008

Trigger Fan OutTrigger Fan OutThe power supply isThe power supply is

A single bivolt 8TE +/-15V power supply (PK60 model)A single bivolt 8TE +/-15V power supply (PK60 model) A 400 mA delayed fuseA 400 mA delayed fuse

The two TFO are supplied with Uninterruptible Power Supply (UPS)..The two TFO are supplied with Uninterruptible Power Supply (UPS)..

The lost of power supply will not issue pulses on the outputs The lost of power supply will not issue pulses on the outputs

But a trigger can be issued about 200 ms after mains lost.But a trigger can be issued about 200 ms after mains lost.

77N. Voumard, AB-BT-ECN. Voumard, AB-BT-EC LBDS Audit, CERN 2008LBDS Audit, CERN 2008

The TFORThe TFORInput circuitInput circuit

There are two input circuits as shown There are two input circuits as shown below.below.

The input circuit is 50Ohms terminated The input circuit is 50Ohms terminated and protected with clamping diodesand protected with clamping diodes

A Schmitt trigger prevents the input A Schmitt trigger prevents the input against glitches (~7.5V)against glitches (~7.5V)

Input connectors are of the SMA typeInput connectors are of the SMA type Four general purpose outputs are Four general purpose outputs are

availableavailable

88N. Voumard, AB-BT-ECN. Voumard, AB-BT-EC LBDS Audit, CERN 2008LBDS Audit, CERN 2008

The TFORThe TFOROutput circuit (backplane distribution of the input signals)Output circuit (backplane distribution of the input signals)

There is two circuits as shown below (corresponds to the two input signals)There is two circuits as shown below (corresponds to the two input signals) The two input signals are transmitted independently on the backplane.The two input signals are transmitted independently on the backplane. A monostable multivibrator HEF-4538 can be used to adjust the pulse width of A monostable multivibrator HEF-4538 can be used to adjust the pulse width of

the pulse from 1 to 5 us (can be bypassed with jumpers). the pulse from 1 to 5 us (can be bypassed with jumpers). A second monostable is with a time constant of 50ms is used to flash a LED on A second monostable is with a time constant of 50ms is used to flash a LED on

the front panel for monitoring.the front panel for monitoring.

99N. Voumard, AB-BT-ECN. Voumard, AB-BT-EC LBDS Audit, CERN 2008LBDS Audit, CERN 2008

The TFOTThe TFOTInput circuit (backplane distribution of the input Input circuit (backplane distribution of the input signals from TFOR)signals from TFOR)

The two signals are ORed with a HEF4071The two signals are ORed with a HEF4071 The resulting signal is buffered with a MAX4427The resulting signal is buffered with a MAX4427 Inputs are protected with clamping diodesInputs are protected with clamping diodes

The backplane circuit cabling from the TFOR card The backplane circuit cabling from the TFOR card to the TFOT cards is in “star”to the TFOT cards is in “star”

The cable length from the TFOR card to all the TFOT The cable length from the TFOR card to all the TFOT cards is the same to ensure the same delay to all the cards is the same to ensure the same delay to all the cards.cards.

1010N. Voumard, AB-BT-ECN. Voumard, AB-BT-EC LBDS Audit, CERN 2008LBDS Audit, CERN 2008

The TFOTThe TFOTOutput circuitOutput circuit

A blocking oscillator type switch is used to drive a transformerA blocking oscillator type switch is used to drive a transformerThe charge needed to drive the two outputs is stored into a 1uF capacitorThe charge needed to drive the two outputs is stored into a 1uF capacitorA 1kOhms resistor limits the current from the power supplyA 1kOhms resistor limits the current from the power supplyThe switch used to drive the transformer is a MAX4429 (6A high speed MOSFET The switch used to drive the transformer is a MAX4429 (6A high speed MOSFET driver)driver)

The two secondary of the transformerThe two secondary of the transformerIs totally floating or can be referenced to card ground with a jumper.Is totally floating or can be referenced to card ground with a jumper.Has a free wheel diode circuit.Has a free wheel diode circuit.Has a delay line to adjust the delay caused by the tolerance of the transformer Has a delay line to adjust the delay caused by the tolerance of the transformer (mainly).(mainly).

The pulse is monitored, on a front panel LED for 50 ms. The pulse is monitored, on a front panel LED for 50 ms.

1111N. Voumard, AB-BT-ECN. Voumard, AB-BT-EC LBDS Audit, CERN 2008LBDS Audit, CERN 2008

Trigger Fan OutTrigger Fan OutAdjustment of the output delaysAdjustment of the output delays

Each of the 48 outputs of all the TFO crates have been measured and the delay Each of the 48 outputs of all the TFO crates have been measured and the delay between input and output are compensated with delay lines.between input and output are compensated with delay lines.

The nominal delay caused by the TFO is The nominal delay caused by the TFO is 161161ns (+/- 3ns).ns (+/- 3ns). The tolerance of the series of delay lines received is sometimes stable and The tolerance of the series of delay lines received is sometimes stable and

sometimes not. They have been measured separately to classify them.sometimes not. They have been measured separately to classify them.

Delay lines used are Rhombus Industries SL7TR type, SIP-7 footprint.Delay lines used are Rhombus Industries SL7TR type, SIP-7 footprint.

1212N. Voumard, AB-BT-ECN. Voumard, AB-BT-EC LBDS Audit, CERN 2008LBDS Audit, CERN 2008

Trigger Fan OutTrigger Fan OutOther clients connected on the TFOOther clients connected on the TFO

FAAS (fast analog acquisition system)FAAS (fast analog acquisition system)

BTV (beam television), position of the beam in the extraction linesBTV (beam television), position of the beam in the extraction lines

BETS software triggeringBETS software triggering

BETS inhibitionBETS inhibition

Acquisition of the UTC dump trigger timeAcquisition of the UTC dump trigger time