ProtoDUNE Trigger Proposal Jonathon Sensenig Josh Klein, Nuno - - PowerPoint PPT Presentation

ProtoDUNE Trigger Proposal

Jonathon Sensenig

Josh Klein, Nuno Barros, David Rivera

Trigger Generation and Distribution

• CRT
• PDS
• Beam

Instr.

Channel Masks CRT PDS Beam Instr.

SubSystem Triggers

Trigger Masks and Prescale

Global Trigger

Timing System

EXPERIMENT

Trigger

Trigger Monitor

Data Streams to artDAQ

TimeStamp

n n n

• Triggers come primarily from 3 sub-systems
• Beam Instrumentation (BI)
• Cosmic Ray Tagger (CRT)
• Photon Detection System (PDS)
• Trigger calculation divided up likewise.
• Subsystem triggers can be masked in/out and pre-scaled.
• Final trigger (global trigger) is some combination of the n

(or a “masked in” subset) sub-system triggers.

• All triggers (sub-system and global) timestamped and

recorded.

• Trigger distribution and vetoing handled by the timing

system

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Beam Instrumentation

DAQ Computers

• ptical fiber

chain

TOF 1 TOF 2

§ (x1) Beam trigger (min. bias, indicating the presence of a beam particle entering the TPC) § (x2) 1 Signal from each of the threshold Cherenkov detectors § (x2) 1 Signal from each of the ToF measurements § (x3) 1 Signal from each of the 4 tracking Sci-Fi detectors § Possible future additions: § (x4) Signals from a ToF trigger (e,!,Κ,p)

• Info thanks to Karol

*Beam Instrumentation setup subject to change

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Trigger: Beam Particle

• CRT
• PDS
• Beam

Instr.

Channel Masks CRT PDS Beam Instr. SubSystem Triggers Trigger Masks and Prescale Global Trigger

BI Channels Beam Spill SciFi Ckov 1 TOF2 CRT Trigger PDS Trigger Beam Trigger PDS Channels

• Example of a possible beam trigger

where there is a “good particle” in the beamline.

• Assumes the PDS will not be
• verwhelmed with light from
• cosmics. True? Will need

simulation.

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CRT Setup

*CRT arrangement from TDR, subject to change

• 2 upstream and 1 (but probably 2) downstream CRT panels.
• X and Y planes each composed of 2 parallel but shifted modules
• Perpendicular X and Y planes to give 25mm xy granularity
• X-Y planes AND’ed by the CRT electronics.
• CTB receives 1 input per 4 modules (X-Y plane

pair) which is 8 inputs per panel.

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Trigger: Cosmic Tagging Calibration

• CRT
• PDS
• Beam

Instr.

Channel Mask CRT PDS Beam Instr. SubSystem Triggers Trigger Mask Global Trigger

CRT Channels Beam Trigger PDS Trigger CRT Trigger

Signals from AND’ed CRT Layers

Front Panel 1 Front Panel 2 Back Panel

• Example of a cosmic trigger where there

is a through-going muon. A hit on the front panel followed by light detected by the PDS and a hit on the back panel.

• This is a bit oversimplified and the logic

use is non-trivial so will have to investigate a bit more.

• Good for SCE calibration and electron

lifetime.

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Trigger: Stopping Muons with Michel electrons

• CRT
• PDS
• Beam

Instr.

Channel Mask CRT PDS Beam Instr. SubSystem Triggers Trigger Mask Global Trigger

CRT Channels Beam Trigger PDS Trigger CRT Trigger

Signals from AND’ed CRT Layers

Front Panel 1 Front Panel 2 Back Panel

• Example of a through-going muon

and Michel electron.

• Hit on the front panel and no hit on

back panel, i.e., the muon stops in cryostat.

• Again, this is a bit oversimplified and

the logic use is non-trivial so will have to investigate a bit more.

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Summary and Direction

• Quite a bit of flexibility in trigger construction, but will need input from physics groups and

administration.

• Tension between what we want to do from a physics perspective and what we can do with

limited beam time.

• Trigger proposals will need simulation to verify, discuss with Robert and Dorota on how to

accomplish this.

• Trigger proposal document being drafted.
• Work under progress… feedback welcomed sooner rather than later.

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