# Presentation: 268682

## MINERvA and Test Beams:First ThoughtsKevin McFarland, University of Rochester

**MINERvA and Test Beams:****First Thoughts****Kevin McFarland, University of Rochester**

**Notes:**
replace main picture

## Apology

- MINERvA’s lack of presence at this meeting does not indicate a lack of interest
- We have a directors’ review Dec 13-15 and the entire collaboration management is unavailable to present in person
- If this facility is not available, we will have to run a test beam program elsewhere
- CERN SPS, KEK endstation, etc.
- We very much would prefer to run at FNAL

- 13 December 2005

## In a Nutshell

*MINERvA needs to reconstruct low energy**(p~0.3-5 GeV) pions, electrons and (p~1-5 GeV) protons.  Kaons and muons (both charges), if available would be used to study stopping particles. *
*Measure response relative to minimum ionizing before showing, shower development** and stopping signature. *
*Benefit of a test beam for this program is obvious.*
*MINERvA would want to install a configurable small detector as a stand-in for the actual detector.*
***Issues that require study***
- Configuration of test detector (size)
- Run plan: date, statistics and # of configurations

- 13 December 2005

## Strawman MINERvA Testbeam Detector

- Caveats: sizes and details need further study!
- Envisaging ready for beam by summer 2008
- See additional slides for details of the actual MINERvA detector for which thisis a stand-in
- Structure: planes ofactive detector(scintillator strips)with absorbers
**Pb ring segment**or **Pb sheet** or **Steel sheet**  forside ECAL, DS ECAL or DS HCAL can be inserted

- 13 December 2005

## Lengthy Material on MINERvA Detector

- 13 December 2005

## Basic Detector

- 

- MINER*v*A proposes to build a low-risk detector with simple, well-understood technology
- Active core is segmented solid scintillator
- Tracking (including low momentum recoil protons)
- Particle identification
- 3 ns (RMS) per hit timing(track direction, stopped *K*±)
- Core surrounded by electromagneticand hadronic calorimeters
- Photon (0) & hadron energy
-     measurement
- MINOS Near Detector as muon catcher

- 13 December 2005

**Notes:**
Cartoon of the detector: walk through from inside

## MINERvA Detector Module

**A frame with two planes has 304 channels**
**256 in inner detector**
**48 in outer detector****(two per slot)**
**43⁄4 M-64 PMTs per module**
**OD readout ganged in groups of four planes**

- Lead Sheets for EM calorimetry

- _Outer Detector_  (OD)Layers of iron/scintillator for hadron calorimetry.  6 “Towers”

- _Inner Detector_ (ID) Hexagonal  X, U, V planes for 3D tracking

**162 in**

- 13 December 2005

**Notes:**
Cartoon of the detector: walk through from inside

## Parts of MINERvA Modules

- An Outer Detector Frame is assembled from steel towers
- Frame hooks and support spacers are added
- One or more planes of scintillator is added
- Pb ring for the side ECAL (not in DS ECALs)
- complete active target “module”

- 13 December 2005

## Parts of MINERvA Modules(cont’d)

- Modules are stacked up like hanging file folders onto the stand
- spacing set by flatness of OD steel, fiber clearance
- Nuclear Targets in separate (passive) frames interspersed
- Veto Wall in front of the detector

- 13 December 2005

## Parts of MINERvA Modules(cont’d)

- Calorimeter modules are built by adding absorbers
- one 1” steel absorber and one scintillator plane in DS HCAL
- two 5/64” Pb absorbers and two scintillators in DS ECAL

- 13 December 2005

## Mass of MINERvA

**DS HCAL:**
**30 tons**

**DS ECAL:**
**15 tons**

**Side HCAL:  116 tons**

**Fully**
**Active ****Target:**
**8.3 tons**

**Nuclear****Targets:**
**6.2 tons****(40% scint.)**

**Side ECAL Pb:  0.6 tons**

- 13 December 2005