# Presentation: 707918

## MICE DAQ

- MICE and ISIS Introduction
- MICE Detector Front End Electronics
- Software and MICE DAQ Architecture
- MICE Triggers
- Status and Schedule

- ...

- Terry Hart,
- Illinois Institute of Technology,
- NFMC Collaboration Meeting, UCLA

- January 31, 2007

## Introduction – MICE Description

- Muon Ionization Cooling Experiment (MICE):  international accelerator R&D project designed to provide first demonstration of muon cooling.
- MICE is being built at Rutherford Appleton Laboratory (RAL) using muon beam generated from ISIS.
- One muon cooling lattice cell with detectors measuring muon beam emittance before and after cooling.

- Terry Hart,
- Illinois Institute of Technology,
- NFMC Collaboration Meeting, UCLA

- January 31, 2007

## Introduction – ISIS Beam Structure

- ISIS proton spills:
-    - 20 ms apart (50 Hz)
-    - About 1 ms wide
-    - Contain ~ 3000 proton bursts
-    - Proton bursts are ~100 ns wide and 324 ns apart

- MICE RF cavity duty cycle limits the spill rate for MICE to 1 Hz.

- 324 ns

- 100 ns

-  ~ 1 ms = 1,000,000 ns

- ●●●

- Terry Hart,
- Illinois Institute of Technology,
- NFMC Collaboration Meeting, UCLA

- January 31, 2007

## Systems for MICE DAQ

- Target System:  Titanium target inserted into ISIS proton beam produces pions which decay into muons.
- RF Cavities:  Eight 201 MHz cavities which accelerate muons along length of MICE.
- DAQ:  Data from MICE trackers, calorimeter, Cherenkov detectors, and time-of-flight counters will be combined to form MICE events.

- ...

-       **ISIS proton spill   ****→ **** MICE target ****→ ****pions,muons    ****→         ****MICE RF Cavities and Detectors**

***These systems need to be synchronized for MICE data collection.***

- Terry Hart,
- Illinois Institute of Technology,
- NFMC Collaboration Meeting, UCLA

- January 31, 2007

## Introduction – MICE Detectors

- MICE DAQ acquires data from
- Trackers
- Calorimeter
- Cherenkov detector
- Time-of-flight counters
- With 600 kHz muon rate within 1 ms wide spill, detector data will be buffered, read out, and built into an event at end of each spill.

- Trackers

- Calorimeter

- Cherenkov detector

- Time-of-flight Counters

- Terry Hart,
- Illinois Institute of Technology,
- NFMC Collaboration Meeting, UCLA

- January 31, 2007

## Front End Electronics (FEE) for Tracker

- Sixteen 512-channel Analog Front End II t (AFE-IIt) boards will read out data from two trackers.
- Tracker data are
- Bitmap of tracker channels with analog charge above preset thresholds
- Digitization of amount of charge of each channel
- Digitization of time of hit with respect to fixed time
- AFE-IIt boards developed for latest D0 experiment upgrade.
- Tracker firmware is being modified to be suitable for 600 kHz muon rate
- Reduce digitization time
- Make use of 4-level buffer so that digitization time isn’t dead time
- Expected tracker data rate ~3 Mbytes/spill.

- Terry Hart,
- Illinois Institute of Technology,
- NFMC Collaboration Meeting, UCLA

- January 31, 2007

## Tracker FEE FirmwareReducing Digitization Time

- ~ 5724 ns:  D0 implementation
- ~ 5670 ns:  Adjust for shorter ISIS bucket period
- 4536 ns:  TriP-t pipeline collect data during digitization
- 2376 ns:  Zero-suppress 30 of 32 TriP-t channels
*1836 ns:  Reduce zero-suppression time from 2 to 1 cycle.*
*1566 ns:  Remove cycles from set-up processes.*

-  Assumed muon rate is 600 kHz for average time between muons of 1667 ns.
-  Clock period taken as 18 ns
-  Assume 2 out of 32 channels of TriP-t have charge data above threshold

**We are now starting to reduce the dead time so that it’s comparable to the **
**average time between muons.**

- Terry Hart,
- Illinois Institute of Technology,
- NFMC Collaboration Meeting, UCLA

- January 31, 2007

## Tracker FEE FirmwareReducing Digitization Time and Using Buffer

-  Clock period taken as 18 ns
-  Assume 2 out of 32 channels of TriP-t have charge data above threshold

- Fraction of Recorded Muons for 600 kHz

-                               No Buffering               1-level Buffer
- tdigi = 5670 ns        0.227                *0.291*
- tdigi = 2376 ns        0.412                *0.601*
- tdigi = 1836 ns     *0.476                 0.699*
- tdigi = 1566 ns     *0.516                 0.753*

- Terry Hart,
- Illinois Institute of Technology,
- NFMC Collaboration Meeting, UCLA

- Tracker FEE FirmwareReducing Digitization Time and Using Buffer

- January 31, 2007

## Time-of-Flight Counters FEE

- Will use CAEN V1290 TDC with 25 ps LSB (least significant bit) with constant fraction discriminators
- Considering time-over-threshold discriminator with leading edge and trailing edge measurement allowing more precise time walk correction
- 60 ps resolution on time of flight measurement has been obtained in test beam.

- Terry Hart,
- Illinois Institute of Technology,
- NFMC Collaboration Meeting, UCLA

- January 31, 2007

## Calorimeter and Cherenkov Detector FEE

- Charge will be measured with 14 bit, 100 MHz flash ADCs (CAEN V1724) coupled with RC shapers.
- Pulse shape analysis (after shaper) allows time resolution ~500 ps => no additional TDC needed.
-  Cosmic ray and beam data taken and analyses underway.

- Terry Hart,
- Illinois Institute of Technology,
- NFMC Collaboration Meeting, UCLA

- January 31, 2007

## MICE DAQ Hardware and Software

- MICE DAQ software will be built from DATE framework used by CERN experiment ALICE
- ALICE = A Large Ion Collider Experiment
- DATE = Data Acquisition and Test Environment
- MICE detectors read out over VME.
- Online data stream will include list of selected physical variables from MICE Control and Monitoring (MCM).
- Data runs will be stopped automatically when a subsystem goes into fault status or in case of connection problem.

- Terry Hart,
- Illinois Institute of Technology,
- NFMC Collaboration Meeting, UCLA

- January 31, 2007

**Notes:**
CERN = Conseil Européen pour la Recherche Nucléaire

## MICE DAQ Architecture

**Trigger **

**distribution**

**Tracker**

**Calorimeter**

**Time of Flight Counters**

**Trigger+ **

**Cherenkov**

**GigaBit Switch**

**Event Builder**

**Online **

**Storage**

** **

**Online**

** **

**Monitoring**

** **

**Run Control**

**Remote Mass**

**Storage**

** **

**100 MegaBit**

** **

**Switch**

**VME Crates**

**Optical links**

**Linux PCs**

**MICE Control and**
**Monitoring****Readout**

**MCM****Subnet**

- Terry Hart,
- Illinois Institute of Technology,
- NFMC Collaboration Meeting, UCLA

- January 31, 2007

## Synchronization Issue

- 3 subsystems have to be synchronized with each other and with the ISIS Machine Cycle:
- Target
- RF
- DAQ
- An “As Soon As Ready” approach has been proposed
- Each system provides a veto signal which is set when the system is not ready to receive  a trigger.
- The first ISIS Machine Start (MS) after all vetos are dropped generates the different triggers.

- Terry Hart,
- Illinois Institute of Technology,
- NFMC Collaboration Meeting, UCLA

- January 31, 2007

## Terry Hart, 

**MICE Veto**

**Target Veto**

**RF Veto**

**DAQ Veto**

**MS**

**Target Request**

**RF Request**

**Target Trigger**

**Protons on target**

**RF Trigger**

**RF Power **

**DT Gate**

**DAQ Trigger**

**Target Delay**

**RF Delay**

**DT Delay**

**20 ms**

**Extraction**

- Terry Hart,
- Illinois Institute of Technology,
- NFMC Collaboration Meeting, UCLA

- January 31, 2007

## Triggers

- DAQ Trigger
- Triggers the readout of the FEE output buffer memory
- Arrives at the end of spill
- Distributed to all VME crates
- Particle Trigger
- Triggers the digitization of the signals arriving at the FEE           (Trackers, Calorimeter, Cherenkov detector, Time-of-Flight counters)
- Distributed to all FEE boards
- MICE expects about 600 Particle Triggers for 1 DAQ trigger

- Terry Hart,
- Illinois Institute of Technology,
- NFMC Collaboration Meeting, UCLA

- January 31, 2007

## DAQ Trigger

- DATE requires dedicated inputs for at least four event types:
***Start of Spill***  Signal sent to DAQ slightly before the beginning of the spill ensuring that all detectors are ready to receive data.  This is a preparation signal for Physics events.
***Physics***  Normal data from events occurring in a proton spill.  Event is built from data from each detector.
***End of Spill***  Signal sent to DAQ when the readout is finished checking that detectors read out data correctly.
***Calibration***  The following are possible ways to calibrate detectors.
***	***- *Empty event (pedestal)*
*	**- Pulser event*
*	**- Cosmic ray event*

- Terry Hart,
- Illinois Institute of Technology,
- NFMC Collaboration Meeting, UCLA

- January 31, 2007

## Particle Trigger

- Particle Trigger Conditions for Normal Events
***Burst***: ISIS burst with
- Target within the Data Taking (DT)-Gate
- FEE not busy
***Beam***: Burst  TOF0
***Upstream***: Beam  TOF1
***Traversing***: Upstream  TOF2

- TOF0

- TOF1

- TOF2

- Terry Hart,
- Illinois Institute of Technology,
- NFMC Collaboration Meeting, UCLA

- January 31, 2007

## Particle Trigger

- Simplest Implementation of the Trigger Condition selection using output Register

**OReg1**

**OReg2**

**OReg3**

**OReg4**

**Burst**

**TOF0**

**TOF1**

**TOF2**

**Particle Trigger**
**Request**

**FEE**
**Busy**

**Particle **
**Trigger**

- Setting OReg selects the trigger condition

- Terry Hart,
- Illinois Institute of Technology,
- NFMC Collaboration Meeting, UCLA

- January 31, 2007

## MICE Status and Schedule

- Terry Hart,
- Illinois Institute of Technology,
- NFMC Collaboration Meeting, UCLA

- January 31, 2007

## MICE DAQ Summary

- DAQ architecture determined
- DATE framework
- Detector FEEs readout out by VME
- Control and monitoring established
- Detector FEEs under development
- Tracker FEE software being modified from D0
- FEE hardware for calorimeter, time-of-flight counters, and Cherenkov detectors under consideration
- Trigger signals and run modes established

- Terry Hart,
- Illinois Institute of Technology,
- NFMC Collaboration Meeting, UCLA

- January 31, 2007

## MICE DAQ Status and Schedule

- February, 2007:  DAQ test bench set up at University of Geneva
- March, 2007:  Order MICE Stage 1 FEE hardware
- July, 2007:  Move MICE DAQ system to RAL
- September, 2007:  DAQ working in MICE Stage 1

- Terry Hart,
- Illinois Institute of Technology,
- NFMC Collaboration Meeting, UCLA

- January 31, 2007