Space Research Laboratory

This page is read only. You can view the source, but not change it. Ask your administrator if you think this is wrong.
===== LEVEL-3 ONBOARD SPECTRA PARAMETERS =====

**Format(s): f30, f40, f50**

<code>
               Level-3 Spectra Parameters, version 3.2 (type-2)


 Parameters for constructing the 'official' ERNE level-3 spectra from level-2
 on-board spectrum counter tables.

 The data are to be used for ERNE on-board spectra OSS-2.30. It is usable for
 later versions also as long as the on-board spectral measurements are not
 changed.



 Energies
 --------

 	Enom = Foil corrected channel energy [MeV/n]

              - For LED this is the arithmetic average of the energies at
                the low- and hi-limit of the channel.

              - For HED the average is weighted by the varying geometric
                factor inside the channel.

       Emin = Minimum energy of the channel [MeV/n]
       Emax = Maximum energy of the channel [MeV/n]

              - Emin and Emax values are currently calculated from various,
                 possibly slightly coflicting data sources.

       See NOTES below.


 GdE
 ---

	GdE = (Geometric factor) x (Energy channel width) [cm^2 sr MeV/n]

       See NOTES 2 and 4 below.


 Channel Detectors
 -----------------

       When there are more than one on-board spectrum counter for an Energy
       channel the best combination of the available measurements have been
       used. The onboard spectrum counters used are indicated in the 'Channel
       Detector' colums:

         LED: the numbers are for the front detectors: D11,D12,...,D17
           0 - Detector not included
           1 - PR1 spectrum counter
           2 - PR2 spectrum counter
           3 - Both PR1 and PR2 counters

         HED: the numbers are for the stopping detector: S2y,D1,D2,D3
           0 - Detector not included
           1 - PR1 spectrum counter
           3 - PR3 spectrum counter
           4 - Both PR1 and PR3 counters (not currently used)


 On-board E-index
 ----------------

	The on-board energy index of the channel. Energy index iE gives the
       nominal (uncorrected) total energy [MeV] at the channel low-limit from
       the formulas:

          LED: Elow = 2^(iE/9) MeV
          HED: Elow = 10 x 2^(iE/9) MeV




 NOTES:
 ------

 1. Foil energy losses have been corrected for. Exception is the recently
    found plastic between HED D2 and D3.

 2. The tabulated values (both Enom and GdE) are calculated for a flat spectrum.

 3. The first and last on-board spectral counters (integral counters) for both
    LED and HED have been omitted. There thus remains 34+34 (LED+HED) channels
    for each isotope in the table. In addition neither of the HED He3 on-board-
    counters number 1 (iE=17), are used, thus the corresponding GdE has value
    of 0.0 and the Channel Detectors are set to '0000'.

 4. The channel limit energies (Emin and Emax) are approximations arrived at from
    different data sets than those used for Enom and GdE calculations. In addition
    energy limits for HED (Emin and EMax) had typically a 0.1 MeV artificial gap
    between the channels. This was because of the coarse grid in GdE calculation.
    This has been manually corrected for by lowering each HED Emin value by 0.5 MeV
    and increasing each Emax value by 0.5 MeV. For this reason if one calculates
    channel widths from this data they don't match the corresponding widths used
    in GdE-calculations.

 5. Limit energies for He3 were not available at all, thus the corresponding
    tabulation values are set to -1.0.

 6. Because of what is said above:

      a) Channel Enom and GdE values are the best possible 'guesse' at this stage.
      b) Channel E-limits should be used for informative purposes only.


 Version history

 3.2 - 2002-09-06 (ER)

       Added minimum and maximum energies for the channels.
       This is designed as 'type-2' parameter table format.

       Changed numeric accuracy to 4 significant numbers for all the data.


 3.1 - 2002-08-15 (ER)

         Corrected 'Channel Detectors' column for LED protons


 3.0 - 2002-02-12 Original version

         Comments and compilation (ER)
         Tabulated data (TL)




     ||----------------------------------------------------------------------------||-------------------------------||------------------------------||----------------------||
     ||                              Energies [MeV/n]                              ||       GdE [cm^2 sr MeV/n]     ||      Channel Detectors       ||  On-board E-index    ||
     ||----------------------------------------------------------------------------||-------------------------------||------------------------------||----------------------||
     ||        proton         |           He3           |           He4            ||          |          |         ||          |         |         ||     |    |     |     ||
     ||----------------------------------------------------------------------------||  proton  |   He3    |   He4   ||  proton  |   He3   |   He4   ||     | p  | He3 | He4 ||
     || Emin    Emax    Enom  |   Emin    Emax    Enom  |   Emin    Emax    Enom   ||          |          |         ||          |         |         ||     |    |     |     ||
     ||----------------------------------------------------------------------------||-------------------------------||------------------------------||----------------------||
       1.331   1.405   1.368      -1.0    -1.0   1.582     1.335   1.409   1.372      0.01926    0.02206    0.01925    '2000020' '2000020' '2000020' ; LED    1    17    19
       1.405   1.487   1.446      -1.0    -1.0   1.670     1.409   1.490   1.450      0.02112    0.02366    0.02092    '2000020' '2000020' '2000020' ;        2    18    20
       1.487   1.575   1.531      -1.0    -1.0   1.766     1.490   1.578   1.534      0.02319    0.02566    0.02307    '2000020' '2000020' '2000020' ;        3    19    21
       1.575   1.673   1.624      -1.0    -1.0   1.872     1.578   1.676   1.627      0.02543    0.02789    0.02535    '2000020' '2000020' '2000020' ;        4    20    22
       1.673   1.781   1.727      -1.0    -1.0   1.988     1.676   1.783   1.729      0.02779    0.03076    0.02769    '2000020' '2000020' '2000020' ;        5    21    23
       1.781   1.897   1.839      -1.0    -1.0   2.115     1.783   1.899   1.841      0.03036    0.03380    0.03027    '2000020' '2000020' '2000020' ;        6    22    24
       1.897   2.025   1.961      -1.0    -1.0   2.255     1.899   2.027   1.963      0.03327    0.03692    0.03332    '2000020' '2000020' '2000020' ;        7    23    25
       2.025   2.164   2.094      -1.0    -1.0   2.406     2.027   2.165   2.096      0.03610    0.04035    0.03589    '2000020' '2000020' '2000020' ;        8    24    26
       2.164   2.316   2.240      -1.0    -1.0   2.572     2.165   2.317   2.241      0.03942    0.04443    0.03942    '2000020' '2000020' '2000020' ;        9    25    27
       2.316   2.480   2.398      -1.0    -1.0   2.752     2.317   2.481   2.399      0.04282    0.04786    0.04276    '2000020' '2000020' '2000020' ;       10    26    28
       2.480   2.659   2.569      -1.0    -1.0   2.947     2.481   2.660   2.570      0.04645    0.05256    0.04635    '2000020' '2000020' '2000020' ;       11    27    29
       2.659   2.853   2.756      -1.0    -1.0   3.160     2.660   2.854   2.757      0.05051    0.05701    0.05049    '2000020' '2000020' '2000020' ;       12    28    30
       2.853   3.064   2.958      -1.0    -1.0   3.390     2.854   3.065   2.959      0.05480    0.06181    0.05477    '2000020' '2000020' '2000020' ;       13    29    31
       3.064   3.292   3.178      -1.0    -1.0   3.641     3.065   3.293   3.179      0.05941    0.06732    0.05938    '2000020' '2000020' '2000020' ;       14    30    32
       3.292   3.540   3.416      -1.0    -1.0   3.912     3.293   3.540   3.417      0.06438    0.07302    0.06437    '2000020' '2000020' '2000020' ;       15    31    33
       3.540   3.808   3.674      -1.0    -1.0   4.207     3.540   3.808   3.674      0.06976     0.2786    0.06973    '2000020' '2333323' '2000020' ;       16    32    34
       3.808   4.098   3.953      -1.0    -1.0   4.526     3.808   4.099   3.954      0.07554     0.3021    0.07551    '2000020' '2333323' '2000020' ;       17    33    35
       4.098   4.414   4.256      -1.0    -1.0   4.871     4.099   4.414   4.256      0.08185     0.3272     0.2879    '2000020' '2333323' '2333323' ;       18    34    36
       4.414   4.754   4.584      -1.0    -1.0   5.245     4.414   4.754   4.584       0.3115     0.3543     0.3116    '2222222' '2333323' '2333323' ;       19    35    37
       4.754   5.122   4.938      -1.0    -1.0   5.650     4.754   5.122   4.938       0.3371     0.3839     0.2413    '2222222' '2333323' '0333303' ;       20    36    38
       5.122   5.521   5.322      -1.0    -1.0   6.088     5.122   5.521   5.322       0.3649     0.4154     0.2613    '2222222' '2333323' '0333303' ;       21    37    39
       5.521   5.953   5.737      -1.0    -1.0   6.562     5.521   5.953   5.737       0.2825     0.3217     0.2824    '0222202' '0333303' '0333303' ;       22    38    40
       5.953   6.419   6.186      -1.0    -1.0   7.074     5.953   6.419   6.186       0.3055     0.3483     0.3054    '0222202' '0333303' '0333303' ;       23    39    41
       6.419   6.923   6.671      -1.0    -1.0   7.629     6.419   6.923   6.671       0.3303     0.3765     0.3303    '0222202' '0333303' '0333303' ;       24    40    42
       6.923   7.468   7.196      -1.0    -1.0   8.228     6.923   7.468   7.196       0.3571     0.4072     0.3572    '0222202' '0333303' '0333303' ;       25    41    43
       7.468   8.058   7.763      -1.0    -1.0   8.876     7.468   8.058   7.763       0.2328     0.4404     0.3860    '0200202' '0333303' '0333303' ;       26    42    44
       8.058   8.695   8.376      -1.0    -1.0   9.577     8.058   8.695   8.376       0.2517     0.4762     0.4173    '0200202' '0333303' '0333303' ;       27    43    45
       8.695   9.383   9.039      -1.0    -1.0   10.33     8.695   9.384   9.039       0.2719     0.5147     0.4510    '0200202' '0333303' '0333303' ;       28    44    46
       9.383   10.13   9.755      -1.0    -1.0   11.15     9.384   10.13   9.756       0.2938     0.5563     0.4880    '0200202' '0333303' '0333303' ;       29    45    47
       10.13   10.93   10.53      -1.0    -1.0   12.03     10.13   10.93   10.53       0.2131     0.6013     0.5268    '0000202' '0333303' '0333303' ;       30    46    48
       10.93   11.80   11.37      -1.0    -1.0   12.99     10.93   11.80   11.37       0.2307     0.6506     0.5682    '0000202' '0333303' '0333303' ;       31    47    49
       11.80   12.74   12.27      -1.0    -1.0   14.03     11.80   12.74   12.27       0.2483     0.7023     0.6149    '0000202' '0333303' '0333303' ;       32    48    50
       12.74   13.76   13.25      -1.0    -1.0   15.14     12.74   13.76   13.25       0.2689     0.7575     0.6644    '0000202' '0333303' '0333303' ;       33    49    51
       13.76   14.85   14.30      -1.0    -1.0   16.35     13.76   14.85   14.30       0.2901     0.8199     0.7178    '0000202' '0333303' '0333303' ;       34    50    52

     
       12.55   12.85   12.74      -1.0    -1.0   14.29     12.55   12.85   12.74       0.9530     0.0000     0.9530    '3000'    '0000'    '1000'    ; HED    1    17    19
       12.85   13.75   13.36      -1.0    -1.0   15.44     12.85   13.75   13.36        13.35      7.969      13.35    '3000'    '1000'    '1000'    ;        2    18    20
       13.75   14.65   14.21      -1.0    -1.0   16.44     13.75   14.65   14.21        20.82      18.42      20.82    '3000'    '1000'    '1000'    ;        3    19    21
       14.65   15.75   15.21      -1.0    -1.0   17.60     14.65   15.75   15.21        32.06      25.02      32.06    '3300'    '1100'    '1100'    ;        4    20    22
       15.75   16.85   16.30      -1.0    -1.0   18.85     15.75   16.85   16.30        34.55      29.62      34.55    '3300'    '1100'    '1100'    ;        5    21    23
       16.85   18.05   17.45      -1.0    -1.0   20.19     16.85   18.05   17.45        38.57      32.59      32.47    '3300'    '1100'    '0100'    ;        6    22    24
       18.05   20.75   18.70      -1.0    -1.0   21.63     18.05   20.75   18.70        41.14      34.43      38.34    '3300'    '1100'    '0100'    ;        7    23    25
       19.35   22.35   20.17      -1.0    -1.0   23.33     19.35   22.35   20.17        49.21      51.63      47.51    '0330'    '1100'    '0100'    ;        8    24    26
       20.75   24.15   21.64      -1.0    -1.0   24.96     20.75   24.15   21.64        45.97      40.04      45.97    '0330'    '0110'    '0110'    ;        9    25    27
       22.35   25.95   23.24      -1.0    -1.0   26.66     22.35   25.95   23.24        46.39      38.81      46.39    '0330'    '0110'    '0110'    ;       10    26    28
       24.05   27.95   24.96      -1.0    -1.0   28.53     24.05   27.95   24.96        46.01      37.53      43.15    '0330'    '0110'    '0010'    ;       11    27    29
       25.85   27.85   26.85      -1.0    -1.0   30.56     25.85   27.85   26.85        49.03      37.18      49.03    '0030'    '0110'    '0010'    ;       12    28    30
       27.85   29.95   28.90      -1.0    -1.0   32.74     27.85   29.95   28.90        51.65      38.94      51.65    '0030'    '0010'    '0010'    ;       13    29    31
       29.95   32.25   31.10      -1.0    -1.0   35.50     29.95   32.25   31.10        56.82      63.31      56.82    '0030'    '0010'    '0010'    ;       14    30    32
       32.25   34.75   33.50      -1.0    -1.0   38.47     32.25   34.75   33.50        61.98      45.75      61.98    '0030'    '0010'    '0010'    ;       15    31    33
       34.75   37.45   36.10      -1.0    -1.0   41.22     34.75   37.45   36.10        67.15      49.02      67.15    '0030'    '0010'    '0010'    ;       16    32    34
       37.45   40.45   38.95      -1.0    -1.0   44.17     37.45   40.45   38.95        74.89      52.52      74.89    '0030'    '0010'    '0010'    ;       17    33    35
       40.45   43.65   42.05      -1.0    -1.0   47.88     40.45   43.65   42.05        80.06      85.41      80.06    '0030'    '0010'    '0010'    ;       18    34    36
       43.65   47.05   45.35      -1.0    -1.0   51.89     43.65   47.05   45.35        85.22      61.71      85.22    '0030'    '0010'    '0010'    ;       19    35    37
       47.05   53.45   48.90      -1.0    -1.0   55.60     47.05   53.45   48.90        92.97      66.12      92.97    '0030'    '0010'    '0010'    ;       20    36    38
       50.75   57.45   52.66      -1.0    -1.0   60.33     50.75   57.45   52.66        105.8      120.7      87.43    '0033'    '0010'    '0010'    ;       21    37    39
       54.75   62.25   57.08      -1.0    -1.0   65.51     54.75   62.25   57.08        113.9      83.62      113.9    '0033'    '0011'    '0011'    ;       22    38    40
       59.15   67.35   61.55      -1.0    -1.0   70.06     59.15   67.35   61.55        127.8      90.01      127.8    '0033'    '0011'    '0011'    ;       23    39    41
       63.85   68.85   66.36      -1.0    -1.0   75.94     63.85   68.85   66.36        140.3      146.9      140.3    '0003'    '0001'    '0001'    ;       24    40    42
       68.85   74.35   71.59      -1.0    -1.0   82.24     68.85   74.35   71.59        154.9      109.2      154.9    '0003'    '0001'    '0001'    ;       25    41    43
       74.35   80.25   77.29      -1.0    -1.0   88.12     74.35   80.25   77.29        162.6      114.9      162.6    '0003'    '0001'    '0001'    ;       26    42    44
       80.25   86.65   83.43      -1.0    -1.0   95.51     80.25   86.65   83.43        171.7      181.6      171.7    '0003'    '0001'    '0001'    ;       27    43    45
       86.65   93.55   90.08      -1.0    -1.0   103.5     86.65   93.55   90.08        179.4      127.1      179.4    '0003'    '0001'    '0001'    ;       28    44    46
       93.55   101.0   97.27      -1.0    -1.0   110.9     93.55   101.0   97.27        187.9      131.8      187.9    '0003'    '0001'    '0001'    ;       29    45    47
       101.0   112.0   104.8      -1.0    -1.0   120.2     101.0   112.0   104.8        186.9      205.2      186.9    '0003'    '0001'    '0001'    ;       30    46    48
       109.0   120.8   112.5      -1.0    -1.0   129.6     109.0   120.8   112.5        74.83      86.74      74.83    '0003'    '0001'    '0001'    ;       31    47    49
       117.8   130.6   121.0      -1.0    -1.0   138.7     117.8   130.6   121.0        15.74      24.94      15.74    '0003'    '0001'    '0001'    ;       32    48    50
       127.2   140.0   129.7      -1.0    -1.0   148.1     127.2   140.0   129.7        1.023      4.194      1.023    '0003'    '0001'    '0001'    ;       33    49    51
       137.4   140.0   138.3      -1.0    -1.0   161.0     137.4   140.0   138.3     0.007085    0.03558   0.007085    '0003'    '0001'    '0001'    ;       34    50    52

  
</code>