**[Technical requirements document]{.underline}**

**[8/30/05]{.underline}**

**Complete Detector**:

Responsible for defining: PM

  ------------------ -------------------- ----------------- ----------------
  Item               Number/description   Spares            Comments

  M64 PMTs           485                  65                

  PMT Boxes          485                  65                

  Hexes (ID planes)  196                  12                Assume 3% waste
                                                            in production
                                                            also

  OD Modules         1612                 89                Assume 3% waste
                                                            in production
                                                            also

  Frames (2          98                                     About 4.3 m tall
  planes/frame)                                             

  Cables per PMT     8                                      

  HCAL's             2.5 cm absorbers,                      
                     one per plane DS and                   
                     one per module US                      

  ECAL                                                      

  Lead alloy         30 cm from the edge                    
  absorbers          of the ID and 0.2 cm                   
                     thick                                  

  Toroid             10 cm thick                            
  steel/absorber                                            
  veto                                                      

  Scint. Strips      205-400 cm                             
  lengths                                                   

  Two scint planes                                          
  per module (1                                             
  frame per module)                                         

  1 active target                                           
  module has 2                                              
  x-layers and one                                          
  each of U and V                                           
  layers                                                    

  beam targets the   3400mm off the floor                   TDR states beam
  detector dead                                             centerline
  center                                                    enters the
                                                            detector at 3.4
                                                            meters off the
                                                            floor

  Outer detector     6 towers, each 1/6                     Each tower has 6
  (OD)               of a hexagon                           slots, nominally
                                                            1.6 cm wide to
                                                            hold the
                                                            scintillator.

  OD scint towers    4 or 6 OD modules or                   
                     stories stacked                        
                     radially outward                       

  OD Module          2 roughly square                       
                     scint strips nested                    
                     to make a                              
                     rectangular package                    

  OD Scint strips    Square, with 1.9cm                     Arranged in
                     sides                                  rectangular
                                                            layers of two
                                                            (TDR fig 57)

  ID scint planes    Hexgonal assemblies                    Each hex is a
  (hex)              of 128 strips                          single view (X,
                                                            U or V)

  ID scint. strips   Triangular, 1.7 cm                     Get drawing from
                     height, 3.3 cm base,                   ANna
                     with embedded WLS                      
                     fiber                                  

  Strongbacks                                               

  Detector placement 1.75 m upstream of                     MINERvA TDR
                     MINO                                   
  ------------------ -------------------- ----------------- ----------------

**Full Module Prototype (FMP):**

Responsible for defining: PM

  ------------------ ------------------ ----------------------------------
  Item                                  Comments

  Average cable      1.31 m             From AT Wide PMT rack prototype,
  length                                preliminary, assumes all fiber
                                        connectors are located on top of
                                        the detector. If some connectors
                                        are located on the side (say for
                                        \"U\" and \"V\" oriented
                                        scintillators), then this number
                                        could jump. Do not know where the
                                        connectors will be located that
                                        read out OD scintillators. Not
                                        scaled to reflect the smaller
                                        dimensions of the narrow detector
                                        modules.

  Total cable        485x8X1.31m = 5.08 
                     Km                 

  Total length of    8X5.08Km=40.6Km    
  clear fiber cable                     

                                        

                                        

                                        

                                        

                                        
  ------------------ ------------------ ----------------------------------

The fractions of cables of each length then, would be: (for whole
detector or prototype?)

Cable Length Fraction

3\' 6\" 3/14 (.214)

4\' 1/7 (.142)

4\' 8\" 9/14 (.642)

The reason why the fraction is so high for the 4\'8\" cables is our
ignorance of the positioning of the connectors for the OD scintillators.
**[This is one of the open design questions, so I assigned the longest
length to the cables reading out the OD scintillators to be
conservative.]{.underline}** The final detector will likely have more
than 3 cable lengths (particularly for the narrower modules).

**Single Plane Prototype (SPP) (WBS 1.1, 1.2, 1.3)**

Responsible for defining:

  ---------------- ------- ------- ------- ----------------------------------
                   need    Spare   Total   Comments

                                           

                                           

                                           

                                           

                                           
  ---------------- ------- ------- ------- ----------------------------------

**Vertical Slice Test III (VST III): (WBS 1.1, 1.2, 1.4?)**

Responsible for defining: Howard Budd

  ---------------- ------- ------- ------- ----------------------------------
                   need    Spare   Total   Comments

                                           

                                           

                                           

                                           

                                           
  ---------------- ------- ------- ------- ----------------------------------

**Outer Detector Scintillator Package Prototype (WBS1.3, ..)**

Responsible for defining: Jeff Nelson

  ---------------- ------- ------- ------- ----------------------------------
                   need    Spare   Total   Comments

                                           

                                           

                                           

                                           

                                           
  ---------------- ------- ------- ------- ----------------------------------

**Quality Control Procedure Prototype (WBS 1.2, 1.4, ...)**

Responsible for defining:

  ---------------- ------- ------- ------- ----------------------------------
                   need    Spare   Total   Comments

                                           

                                           

                                           

                                           

                                           
  ---------------- ------- ------- ------- ----------------------------------

**PMT Box Prototype (WBS 1.5, ...)**

Responsible for defining: Tony Mann

  ---------------- ------- ------- ------- ----------------------------------
                   need    Spare   Total   Comments

                                           

                                           

                                           

                                           

                                           
  ---------------- ------- ------- ------- ----------------------------------

**PMT Tester Prototype (WBS1.6,...)**

Responsible for defining: Ioanna Niculescue, George Tzanakas

  ---------------- ------- ------- ------- ----------------------------------
                   need    Spare   Total   Comments

                                           

                                           

                                           

                                           

                                           
  ---------------- ------- ------- ------- ----------------------------------

**DAQ/ Electronics Prototypes (WBS1.7, ...)**

Responsible for defining: Dave Casper

  ---------------- ------- ------- ------- ----------------------------------
                   need    Spare   Total   Comments

                                           

                                           

                                           

                                           

                                           
  ---------------- ------- ------- ------- ----------------------------------

**OD Frames Prototype (WBS 1.8, ...)**

Responsible for defining: Jim Kilmer

  ---------------- ------- ------- ------- ----------------------------------
                   need    Spare   Total   Comments

                                           

                                           

                                           

                                           

                                           
  ---------------- ------- ------- ------- ----------------------------------

**Scale Model Assembly Prototypes (WBS 1.9)**

Responsible for defining: Bob Bradford, Jim Kilmer

  ---------------- ------- ------- ------- ----------------------------------
                   need    Spare   Total   Comments

                                           

                                           

                                           

                                           

                                           
  ---------------- ------- ------- ------- ----------------------------------

**[Fiber Weave Pattern schematic (8/8/05)]{.underline}**

![](media/image1.jpeg){width="5.988888888888889in"
height="4.624305555555556in"}

![](media/image2.png){width="5.995138888888889in"
height="7.147916666666666in"}