See https://elog.ph.ed.ac.uk/AIDA/555

Date files May2017/R1_0 to May2017/R_79 are an extended (c. 3.8 day) background run with
BNC PB-4 Pulser OFF and and a relatively high slow comparator threshold 0x64 to reduce
data volume.

Attachment 1 - DSSSD#1-6 m_p versus m_n 

Attachment 2 - DSSSD#1-6 x versus y hit patterns

Attachment 3 - DSSSD#1-6 E_p versus E_n (dispersion ~20-23keV/channel)

Attachment 4 - DSSSD#1-6 E_p versus E_n (with tags)

Attachment 5 - 2D contour levels & colours for all 2D spectra above

Attachment 6 - MIDASsort subroutine

Attachment 7 - MIDASsort namelist I/O variables

Attachments 8-10 - ADC offset calculation logs etc

Attachment 11 - spectrum titles

MIDASsort calculates channel and ADC data as follows

       ch = channel + ( module - 1 ) * 64 + ( range * 2048 )
       adc_data = INT( RSHIFT( ABS( adc_data - 32768 ), 3 ) - offset(ch) + 0.5 )

       where

       channel = FEE channel # (0-63)
       module = FEE module # (1-24)
       range = LEC or HEC (LEC = 0, HEC = 1)

ADC offsets were calculated using the pulser walkthrough data of files May2017/R4
and command

cd ~/td/calibration
offsets /homes/npg/Spectra/R4 100 1400 15 10

where the peakfind peak search parameters are limits 100-1400 channels, fwhm=15 channels and acceptance=10%

Probably ~10% of ADC offsets need manual checking/adjustment

The 2D spectra (attachments 1-4) were produced for events with

multiplicities 0 < m_p < 8 *and* 0 < m_n < 8
all x-y combinations incremented

no clustering, gain matching or software thresholds

All DSSSDs show Uranium 4n+2 decay sequence background spectra from the intrinsic activity of the DSSSDs
and airborne decay products (e.g. 222Rn). Not clear why statistics are higher for DSSSD#1 cf. DSSSD#2-6.
One possibility is the activity of the aluminized Mylar window just upstream of DSSSD#1? Surrounding air
and Al snout would presumably affect DSSSD#1 and #6 about the same.

  $variables
  dsssd_a( 1 ) = 1
  dsssd_a( 2 ) = 2
  dsssd_a( 3 ) = 9
  dsssd_a( 4 ) = 10
  dsssd_a( 5 ) = 17
  dsssd_a( 6 ) = 18
  dsssd_b( 1 ) = 20
  dsssd_b( 2 ) = 19
  dsssd_b( 3 ) = 12
  dsssd_b( 4 ) = 11
  dsssd_b( 5 ) = 4
  dsssd_b( 6 ) = 3
  dsssd_c( 1 ) = 22
  dsssd_c( 2 ) = 21
  dsssd_c( 3 ) = 14
  dsssd_c( 4 ) = 13
  dsssd_c( 5 ) = 6
  dsssd_c( 6 ) = 5
  dsssd_d( 1 ) = 23
  dsssd_d( 2 ) = 24
  dsssd_d( 3 ) = 15
  dsssd_d( 4 ) = 16
  dsssd_d( 5 ) = 7
  dsssd_d( 6 ) = 8
  offset = 4096*0.0
  gain = 4096*1.0
  c = 8*1.0
  w = 32*0
  offset(   0) =    16.10
  offset(   1) =   -14.93
  offset(   2) =    -4.03
  offset(   3) =    24.20
  offset(   4) =    -1.49
  offset(   5) =    18.78
  offset(   6) =     2.57
  offset(   7) =    -0.06
  offset(   8) =     8.52
  offset(   9) =    17.08
  offset(  10) =    -8.18
  offset(  11) =    11.06
  offset(  12) =     1.45
  offset(  13) =    -0.11
  offset(  14) =    -5.27
  offset(  15) =    12.08
  offset(  16) =   -13.45
  offset(  17) =   -23.82
  offset(  18) =   -18.33
  offset(  19) =     9.29
  offset(  20) =     1.15
  offset(  21) =   -20.83
  offset(  22) =   -14.00
  offset(  23) =     0.04
  offset(  24) =    -0.18
  offset(  25) =    -0.13
  offset(  26) =    -7.15
  offset(  27) =    -0.09
  offset(  28) =     8.33
  offset(  29) =   -16.03
  offset(  30) =     9.93
  offset(  31) =    -0.08
  offset(  32) =    -8.71
  offset(  33) =   -28.08
  offset(  34) =    -1.57
  offset(  35) =     4.32
  offset(  36) =    -0.98
  offset(  37) =     9.03
  offset(  38) =    10.18
  offset(  39) =    -8.64
  offset(  40) =    15.82
  offset(  41) = -9999.99
  offset(  42) =    25.30
  offset(  43) =    -1.59
  offset(  44) =     1.77
  offset(  45) =    10.58
  offset(  46) =    16.35
  offset(  47) =     3.63
  offset(  48) =    -3.42
  offset(  49) =   -14.59
  offset(  50) =    35.18
  offset(  51) =     4.42
  offset(  52) =    12.15
  offset(  53) = -9999.99
  offset(  54) = -9999.99
  offset(  55) = -9999.99
  offset(  56) =    15.79
  offset(  57) = -9999.99
  offset(  58) = -9999.99
  offset(  59) =    37.06
  offset(  60) =     0.63
  offset(  61) =    22.36
  offset(  62) = -9999.99
  offset(  63) =    11.76
  offset(  64) =    26.68
  offset(  65) =   321.40
  offset(  66) =   -16.48
  offset(  67) =    11.08
  offset(  68) =    13.34
  offset(  69) =    10.44
  offset(  70) =    -1.68
  offset(  71) =    52.27
  offset(  72) =    16.87
  offset(  73) = -9999.99
  offset(  74) =     0.25
  offset(  75) =    11.73
  offset(  76) =    -4.28
  offset(  77) =    26.30
  offset(  78) =   -14.03
  offset(  79) =   -19.91
  offset(  80) =     3.36
  offset(  81) =    -9.93
  offset(  82) =    -7.04
  offset(  83) =    14.20
  offset(  84) =     4.07
  offset(  85) =   -33.64
  offset(  86) =     1.75
  offset(  87) =    -8.25
  offset(  88) =     0.12
  offset(  89) = -9999.99
  offset(  90) =    -3.26
  offset(  91) =    14.34
  offset(  92) =   -24.36
  offset(  93) =    -8.27
  offset(  94) =    -0.30
  offset(  95) =     5.13
  offset(  96) =    47.52
  offset(  97) =    29.22
  offset(  98) =    10.99
  offset(  99) =    38.34
  offset( 100) =    25.33
  offset( 101) =     9.46
  offset( 102) =    29.87
  offset( 103) =    31.58
  offset( 104) =     8.87
  offset( 105) =    32.96
  offset( 106) =    -8.22
  offset( 107) =    12.51
  offset( 108) =    28.56
  offset( 109) =    34.60
  offset( 110) =     9.83
  offset( 111) =    50.37
  offset( 112) =     1.92
  offset( 113) =   102.85
  offset( 114) = -9999.99
  offset( 115) =   -39.65
  offset( 116) =   -40.48
  offset( 117) = -9999.99
  offset( 118) = -9999.99
  offset( 119) = -9999.99
  offset( 120) = -9999.99
  offset( 121) =   -31.23
  offset( 122) =   -34.30
  offset( 123) =  -165.01
  offset( 124) = -9999.99
  offset( 125) =   -25.43
  offset( 126) =   -12.98
  offset( 127) =   -24.50
  offset( 128) = -9999.99
  offset( 129) =   -30.13
  offset( 130) =   -14.02
  offset( 131) =     8.01
  offset( 132) =    -2.04
  offset( 133) =     5.37
  offset( 134) =   -13.81
  offset( 135) =   -32.82
  offset( 136) =    -2.94
  offset( 137) =   -19.71
  offset( 138) =   -15.45
  offset( 139) =    28.13
  offset( 140) =   -10.23
  offset( 141) =   -19.78
  offset( 142) =     6.51
  offset( 143) =   -22.02
  offset( 144) =   -35.77
  offset( 145) =   -20.93
  offset( 146) =    -8.63
  offset( 147) =   -17.27
  offset( 148) =    -4.88
  offset( 149) =     2.34
  offset( 150) =     9.69
  offset( 151) =   124.36
  offset( 152) =   -10.54
  offset( 153) =   -32.31
  offset( 154) =    -1.74
  offset( 155) =     6.40
  offset( 156) =   -41.53
  offset( 157) =   -12.64
  offset( 158) = -9999.99
  offset( 159) =    -2.22
  offset( 160) =   -17.31
  offset( 161) = -9999.99
  offset( 162) =     5.38
  offset( 163) =    -1.76
  offset( 164) =   -18.30
  offset( 165) =     9.68
  offset( 166) =     6.79
  offset( 167) =  -126.74
  offset( 168) =    -9.77
  offset( 169) =     8.47
  offset( 170) =     7.11
  offset( 171) =    28.72
  offset( 172) =   -29.96
  offset( 173) =   -27.75
  offset( 174) =    -2.43
  offset( 175) =    11.08
  offset( 176) =     7.05
  offset( 177) =   -27.55
  offset( 178) =    -1.09
  offset( 179) =     5.26
  offset( 180) =   -12.73
  offset( 181) =   -15.53
  offset( 182) =    -6.55
  offset( 183) =    34.68
  offset( 184) =    19.55
  offset( 185) =   -14.17
  offset( 186) =    -8.89
  offset( 187) =     8.12
  offset( 188) =    -9.06
  offset( 189) =     8.78
  offset( 190) =   -31.35
  offset( 191) =     5.97
  offset( 192) =   -13.90
  offset( 193) =   -10.36
  offset( 194) =    18.66
  offset( 195) =    -9.45
  offset( 196) =     8.94
  offset( 197) =     8.83
  offset( 198) =    -0.29
  offset( 199) =   -20.45
  offset( 200) =    -8.42
  offset( 201) =    -7.99
  offset( 202) =   -12.23
  offset( 203) =    -2.14
  offset( 204) =    -3.89
  offset( 205) =    -0.34
  offset( 206) =    25.49
  offset( 207) =    11.81
  offset( 208) =     7.79
  offset( 209) =    -2.57
  offset( 210) =    29.34
  offset( 211) =    -5.80
  offset( 212) =    14.64
  offset( 213) =    -2.74offset(   0) =    16.10
  offset(   1) =   -14.93
  offset(   2) =    -4.03
  offset(   3) =    24.20
  offset(   4) =    -1.49
  offset(   5) =    18.78
  offset(   6) =     2.57
  offset(   7) =    -0.06
  offset(   8) =     8.52
  offset(   9) =    17.08
  offset(  10) =    -8.18
  offset(  11) =    11.06
  offset(  12) =     1.45
  offset(  13) =    -0.11
  offset(  14) =    -5.27
  offset(  15) =    12.08
  offset(  16) =   -13.45
  offset(  17) =   -23.82
  offset(  18) =   -18.33
  offset(  19) =     9.29
  offset(  20) =     1.15
  offset(  21) =   -20.83
  offset(  22) =   -14.00
  offset(  23) =     0.04
  offset(  24) =    -0.18
  offset(  25) =    -0.13
  offset(  26) =    -7.15
  offset(  27) =    -0.09
  offset(  28) =     8.33
  offset(  29) =   -16.03
  offset(  30) =     9.93
  offset(  31) =    -0.08
  offset(  32) =    -8.71
  offset(  33) =   -28.08
  offset(  34) =    -1.57
  offset(  35) =     4.32
  offset(  36) =    -0.98
  offset(  37) =     9.03
  offset(  38) =    10.18
  offset(  39) =    -8.64
  offset(  40) =    15.82
  offset(  41) = -9999.99
  offset(  42) =    25.30
  offset(  43) =    -1.59
  offset(  44) =     1.77
  offset(  45) =    10.58
  offset(  46) =    16.35
  offset(  47) =     3.63
  offset(  48) =    -3.42
  offset(  49) =   -14.59
  offset(  50) =    35.18
  offset(  51) =     4.42
  offset(  52) =    12.15
  offset(  53) = -9999.99
  offset(  54) = -9999.99
  offset(  55) = -9999.99
  offset(  56) =    15.79
  offset(  57) = -9999.99