ERNE Level-2 data EXPORT (ASCII) FORMAT description =================================================== Document Version 3.5 2023-01-04 Esa Riihonen ERNE level-1 files will be reduced to following ASCII data formats for CEPAC collaborators and NASA archives. The on board analysed intensities and counting rates from 1.3-130 MeV/n will be given in 20 channels per ion species, 10 from LED and 10 from HED. Likewise, all the pulse height data of all silicon detectors and the HED D2 (CsI scintillator) are presented. The pulse height data of ions stopping in HED D3 (BGO scintillator) are excluded for two reasons: 1) analysis of ions depositing nonzero signals in D3 is complicated and time consuming due to the large background flux caused by the inefficiency of the AC detector below it, and because of small amounts of solar particle data (that are less burdened with the background) gathered for calibration purposes at highest energies (up to 500 MeV/n) so far. 2) omitting these data from the data set reduces it considerably. The onboard analysed proton and alpha fluxes for the D3-detector are given, however, so the upper energy limit for all ion species in the data set is near or above 100 MeV/n. Contact information: Rami Vainio email: rami.vainio@utu.fi Esa Riihonen email: esa.riihonen@utu.fi address: Space Research Laboratory Department of Physics and Astronomy FI-20014 University of Turku Finland 0. Definitions ============== Below is a very brief description of some of the main issues relevant for understanding the data. A somewhat more detailed description of the instrument (with illustrations) can be found at our web site: http://www.srl.utu.fi LED detector ------------ Low Energy Detector is a two-layer semiconductor (silicon) detector, with an anticoincidence (AC) shield at the bottom. The upper layer consist of 7 segments (D11-D17). The common lower layer is called D2. HED detector ------------ High Energy Detector consist of 7 detector layers and an anticoincidence (AC) shield. First 4 layers are position sensitive silicon strip detectors (S1x, S1y, S2x, S2y), they are followed by an other silicon detector (D1), a CsI scintillator (D2) and a BGO-scintillator (D3). Basic measurement period ------------------------ Basic measurement period is 59.9531 seconds. Traditionally the period is referred as a 'minute'. Hit levels ---------- Both detectors have a selectable general threshold level or 'Hit level'. There are two levels: 1-fold and 3-fold. Normal operations use 1-fold level. There is however a problem in HED caused by cross talk between D1-detector and AC-system. This affects the heavier elements reducing their detection efficiency. Using 3-fold level cures that, but in expense of certain proton channels as their signals in some detector layers fall below the increased threshold. During the years the HED and LED 3-fold hit level has been set according to various schemes (outside of the indicated times both HED and LED hit levels have been kept at their 1-fold value): 1) For most of the time from 1996-06-18 up to 1997-07-15 HED was configured to 3-fold hit level. 2) From 1999-06-04 up to 2013-12-03 HED hit level was under automatic control by the on-board SW. The hit level was set to 3-fold value based the 4-minute averaged helium intensity. The basic scheme was 4-minute at 1-fold level followed by 16-minutes at 3-fold level. 3) From 2001-01-25 up to 2013-12-03 LED hit level was under automatic control by the on-board SW. The hit level was set to 3-fold value based the 4-minute averaged helium intensity. The basic scheme was 4-minute at 1-fold level followed by 16-minutes at 3-fold level. NOTE: For the 3-fold minutes the count values for the affected proton channels have been replaced with -1. The intensity values have been replaced with time interpolated values based on the adjagent 1-fold periods. In case the interpolation has not been possible the intensity values are set to -1.0. Data versions ------------- Since launch the on-board system has been updated several times. Some of the changes have also affected the telemetry data, these are deemed 'format versions'. The relevant formats are: f10 2 Dec 1995 Original launch format f40 19 Apr 2000 Major update of the on-board program f40brk 21 Nov 2000 HED S1X H2 E-amplifier breakdown at 00:15:44.833 f50 3 Jul 2001 On-board SW updated to (partially) fix the HED S1X E-amplifier breakdown. The format f20 has never existed and f30 was a short lived test version with no user level data. The version designation f40brk is unofficial and not used outside this document. NOTE: all the f40brk HED data are left out from this data set. The corresponding files are provided but are empty. NOTE: The particles through the broken S1X H2 detector are left out from the f50 HED PHA data. The effects on data handling between different versions are compiled in the tables in section 7. 1. File Types ============= --------------------------------------------------------------------- File Content Naming format --------------------------------------------------------------------- ERNE status file ESUyydoy.STS LED onboard analysed counting rates and intensities LEDyydoy.SL2 HED onboard analysed counting rates and intensities HEDyydoy.SL2 LED pulse height data LEDyydoy.PL2 HED pulse height data HEDyydoy.PL2 --------------------------------------------------------------------- In below, the number in the left column of the file descriptions is the column number in the corresponding ASCII file. NOTE: Due to temperature issues ERNE has been operated in BACKUP-mode with LED turned OFF during the periheli-months around the new-year. During these times the LED files are empty. 2. Status file: ESUyydoy.STS ============================ -------------------------------------------------------------------------------- # Label Format Contents -------------------------------------------------------------------------------- 1 LOBT I10 TAI time stamp (seconds since 1.1.1958) - Local On-board Time (i.e., experiment clock) of the start of the measurement period. The instrument clock is periodically synchroniced with the SOHO On-board Time (OBT) clock. 2 EST Z5.4 HEXADECIMAL represenation of the ERNE status word bits 0..15 -------------------------------------------------------------------------------- ERNE status word bits: : b0 = HED OFF b1 = LED OFF b2 ... b7 RESERVED b8 = HED S1H2XHIT Disconnected b9 = HED AC1 Disconnected b10 = HED AC2 Disconnected b11 = HED electrons excluded b12 = HED HIT 3x b13 = LED HIT 3x b14 = HED overload b15 = LED overload Nominal state is all bits = 0. On minutes with one or more flags set the data should be handled with caution. Bit0: No HED data. Bit1: No LED data. Bit8: The instrument is operated in this mode for f50-data due to the partial breakdown of H2-half of the S1x-detector. Bit9: HED bottom anticoincidence detector disconnected. Used only for tests, should be always 0 for the EXPORT-data. Bit10: HED side anticoincidence detector disconnected. Used only for tests, should be always 0 for the EXPORT-data. Bit11: There are some test periods with the electrons excluded at the hardware logic. Because the hardware electron identification is not perfect this may have also (at this moment unknown) effect on HED proton efficiencies. Bit12: When set, the highest HED proton channels operate on severely reduced efficiency. Bit13: When set, the highest LED proton channels operate on severely reduced efficiency. Bit14: The measurement doesn't cover the whole minute. The exact integration time is not known. Bit15: The measurement doesn't cover the whole minute. The exact integration time is not known. 3. Intensity and counting rate file: LEDyydoy.SL2 ================================================= NOTE: The channel energy values below are the approximate values used by the on-board program for the data categorization. The refined values to be used with any on-ground data analysis are given in section 7. -------------------------------------------------------------------------------- # Label Format Contents Unit Note -------------------------------------------------------------------------------- 1 YEAR I4 year 2 DOY I4 day of year 3 MS I9 ms of day 4 LOBT I11 seconds since 1.1.1958 5 PL1 E9.2 intensity p: 1.3 - 1.6 MeV 1/(cm**2 sr s MeV) 6 PL2 E9.2 intensity p: 1.6 - 2.0 MeV 1/(cm**2 sr s MeV) 7 PL3 E9.2 intensity p: 2.0 - 2.5 MeV 1/(cm**2 sr s MeV) 8 PL4 E9.2 intensity p: 2.5 - 3.2 MeV 1/(cm**2 sr s MeV) 9 PL5 E9.2 intensity p: 3.2 - 4.0 MeV 1/(cm**2 sr s MeV) 10 PL6 E9.2 intensity p: 4.0 - 5.0 MeV 1/(cm**2 sr s MeV) 11 PL7 E9.2 intensity p: 5.0 - 6.4 MeV 1/(cm**2 sr s MeV) 12 PL8 E9.2 intensity p: 6.4 - 8.0 MeV 1/(cm**2 sr s MeV) 13 PL9 E9.2 intensity p: 8.0 - 10 MeV 1/(cm**2 sr s MeV) 14 PL10 E9.2 intensity p: 10 - 13 MeV 1/(cm**2 sr s MeV) 15 AL1 E9.2 intensity 4He: 1.3 - 1.6 MeV/n 1/(cm**2 sr s MeV/n) 16 AL2 E9.2 intensity 4He: 1.6 - 2.0 MeV/n 1/(cm**2 sr s MeV/n) 17 AL3 E9.2 intensity 4He: 2.0 - 2.5 MeV/n 1/(cm**2 sr s MeV/n) 18 AL4 E9.2 intensity 4He: 2.5 - 3.2 MeV/n 1/(cm**2 sr s MeV/n) 19 AL5 E9.2 intensity 4He: 3.2 - 4.0 MeV/n 1/(cm**2 sr s MeV/n) 20 AL6 E9.2 intensity 4He: 4.0 - 5.0 MeV/n 1/(cm**2 sr s MeV/n) 21 AL7 E9.2 intensity 4He: 5.0 - 6.4 MeV/n 1/(cm**2 sr s MeV/n) 22 AL8 E9.2 intensity 4He: 6.4 - 8.0 MeV/n 1/(cm**2 sr s MeV/n) 23 AL9 E9.2 intensity 4He: 8.0 - 10 MeV/n 1/(cm**2 sr s MeV/n) 24 AL10 E9.2 intensity 4He: 10 - 13 MeV/n 1/(cm**2 sr s MeV/n) 25 PLC1 I6 counting rate in PL1 counts (/ min) 26 PLC2 I6 counting rate in PL2 counts (/ min) 27 PLC3 I6 counting rate in PL3 counts (/ min) 28 PLC4 I6 counting rate in PL4 counts (/ min) 29 PLC5 I6 counting rate in PL5 counts (/ min) 30 PLC6 I6 counting rate in PL6 counts (/ min) 31 PLC7 I6 counting rate in PL7 counts (/ min) 32 PLC8 I6 counting rate in PL8 counts (/ min) 33 PLC9 I6 counting rate in PL9 counts (/ min) 34 PLC10 I6 counting rate in PL10 counts (/ min) 35 ALC1 I6 counting rate in AL1 counts (/ min) 36 ALC2 I6 counting rate in AL2 counts (/ min) 37 ALC3 I6 counting rate in AL3 counts (/ min) 38 ALC4 I6 counting rate in AL4 counts (/ min) 39 ALC5 I6 counting rate in AL5 counts (/ min) 40 ALC6 I6 counting rate in AL6 counts (/ min) 41 ALC7 I6 counting rate in AL7 counts (/ min) 42 ALC8 I6 counting rate in AL8 counts (/ min) 43 ALC9 I6 counting rate in AL9 counts (/ min) 44 ALC10 I6 counting rate in AL10 counts (/ min) 45 LEDl E9.2 LED light priority ion norm (1) 46 LEDi E9.2 LED helium priority ion norm (1) 47 LEDh E9.2 LED heavy priority ion norm (1) 48 Lpr2sr E9.2 LED pr2 correction factor (1) 49 Lpr1sr E9.2 LED pr1 correction factor (1) -------------------------------------------------------------------------------- (1) Light/helium/heavy priority ion norm is used for normalizing the PHA observations (LEDyydoy.PL2 files). In order to get correct intensities, multiply the PHA intensity with the associated priority ion norm and pr correction factor (the correct priorities are given as fields for each PHA event in the PHA file). These factors are constant for each measurement period ('minute'). In the PHA-files there is one record for each particle, thus including these factors there would result in a serious and unnecessary bloating of the amount of data. The priority norms, LEDl, LEDi, and LEDh, correct for the sampling that is due to the finite size of the telemetry buffer allocated for the PHA data. Light priority ion = hydrogen + helium (+identification errors in f10) Helium priority ion = helium only (+identification errors in f10) Heavy priority ion = heavier than helium Priority correction factors, Lpr2sr and Lpr1sr, correct for the total sampling (hardware + software) in the onboard analysis including intentional sampling and instrument and analysis dead time. 4. Intensity and counting rate file: HEDyydoy.SL2 ================================================= NOTE: The channel energy values below are the approximate values used by the on-board program for the data categorization. The refined values to be used with any on-ground data analysis are given in section 7. -------------------------------------------------------------------------------- # Label Format Contents Unit Note -------------------------------------------------------------------------------- 1 YEAR I4 year 2 DOY I4 day of year 3 MS I9 ms of day 4 LOBT I12 seconds since 1.1.1958 5 PH1 E9.2 intensity p: 13 - 16 MeV 1/(cm**2 sr s MeV) 6 PH2 E9.2 intensity p: 16 - 20 MeV 1/(cm**2 sr s MeV) 7 PH3 E9.2 intensity p: 20 - 25 MeV 1/(cm**2 sr s MeV) 8 PH4 E9.2 intensity p: 25 - 32 MeV 1/(cm**2 sr s MeV) 9 PH5 E9.2 intensity p: 32 - 40 MeV 1/(cm**2 sr s MeV) 10 PH6 E9.2 intensity p: 40 - 50 MeV 1/(cm**2 sr s MeV) 11 PH7 E9.2 intensity p: 50 - 64 MeV 1/(cm**2 sr s MeV) (1) 12 PH8 E9.2 intensity p: 64 - 80 MeV 1/(cm**2 sr s MeV) (1) 13 PH9 E9.2 intensity p: 80 - 100 MeV 1/(cm**2 sr s MeV) (1) 14 PH10 E9.2 intensity p: 100 - 130 MeV 1/(cm**2 sr s MeV) (1) 15 AH1 E9.2 intensity 4He: 13 - 16 MeV/n 1/(cm**2 sr s MeV/n) 16 AH2 E9.2 intensity 4He: 16 - 20 MeV/n 1/(cm**2 sr s MeV/n) 17 AH3 E9.2 intensity 4He: 20 - 25 MeV/n 1/(cm**2 sr s MeV/n) 18 AH4 E9.2 intensity 4He: 25 - 32 MeV/n 1/(cm**2 sr s MeV/n) 19 AH5 E9.2 intensity 4He: 32 - 40 MeV/n 1/(cm**2 sr s MeV/n) 20 AH6 E9.2 intensity 4He: 40 - 50 MeV/n 1/(cm**2 sr s MeV/n) 21 AH7 E9.2 intensity 4He: 50 - 64 MeV/n 1/(cm**2 sr s MeV/n) (2) 22 AH8 E9.2 intensity 4He: 64 - 80 MeV/n 1/(cm**2 sr s MeV/n) (2) 23 AH9 E9.2 intensity 4He: 80 - 100 MeV/n 1/(cm**2 sr s MeV/n) (2) 24 AH10 E9.2 intensity 4He: 100 - 130 MeV/n 1/(cm**2 sr s MeV/n) 25 PHC1 I6 counting rate in PH1 counts (/ min) 26 PHC2 I6 counting rate in PH2 counts (/ min) 27 PHC3 I6 counting rate in PH3 counts (/ min) 28 PHC4 I6 counting rate in PH4 counts (/ min) 29 PHC5 I6 counting rate in PH5 counts (/ min) 30 PHC6 I6 counting rate in PH6 counts (/ min) 31 PHC7 I6 counting rate in PH7 counts (/ min) 32 PHC8 I6 counting rate in PH8 counts (/ min) 33 PHC9 I6 counting rate in PH9 counts (/ min) 34 PHC10 I6 counting rate in PH10 counts (/ min) 35 AHC1 I6 counting rate in AH1 counts (/ min) 36 AHC2 I6 counting rate in AH2 counts (/ min) 37 AHC3 I6 counting rate in AH3 counts (/ min) 38 AHC4 I6 counting rate in AH4 counts (/ min) 39 AHC5 I6 counting rate in AH5 counts (/ min) 40 AHC6 I6 counting rate in AH6 counts (/ min) 41 AHC7 I6 counting rate in AH7 counts (/ min) 42 AHC8 I6 counting rate in AH8 counts (/ min) 43 AHC9 I6 counting rate in AH9 counts (/ min) 44 AHC10 I6 counting rate in AH10 counts (/ min) 45 INT I8 Integral countrate (> 50 MeV/n) counts (/ min) (3) 46 ED2 I8 D2-stopping "electrons" counts (/ min) (4) 47 ED3 I8 D3-stopping "electrons" counts (/ min) (4) 48 HEDl E9.2 HED light priority ion norm (5) 49 HEDi E9.2 HED helium priority ion norm (5) 50 HEDh E9.2 HED heavy priority ion norm (5) 51 Hpr3sr E9.2 HED pr3 correction factor (5) 52 Hpr1sr E9.2 HED pr1 correction factor (5) -------------------------------------------------------------------------------- (1) The D3 BGO-scintillator light yield is low for the hydrogen isotopes. This leads to a degraded energy resolution in these channels. In addition, the onboard calibration parameters for the light yield of hydrogen ions in BGO have been slightly erraneous, so the nominal energy ranges are not accurate (see section 7). These channels are also subjected to a large background from penetrating particles, since the AC detectors (plastic scintillators read out with photo diodes) respond poorly to relativistic, low-Z particles. Thus these channels are reliable only during particle events. When HED HIT levels are 3-fold the channels are not usable, because then protons above 60 MeV generate events with a very low and unknown effectivity. The 3-fold hit level mode is intended for high-Z particle measurement. (2) The D3 helium channels also suffer from the background generated by penetrating particles. (3) The integral counting rate is the following coincidence counter: S1Y_HIT_XOR*S1X_HIT_XOR*S2Y_HIT_XOR*(D3_HIT*D1E_1P3*/AC1_HIT/+AC1_HIT), where S1Y_HIT_XOR means that one of the halves of S1Y has a hit (other HIT_XORs similarly), D3_HIT and AC1_HIT mean a hit in D3- and AC1- scintillator (AC ate the bottom of the detector stack), respectively. The counter is sensitive to all ions that reach at least D3 detector and, in case of proton, have energy less than an upper limit depending on the hit levels used. Note that the signal D1E_1P3 (D1 energy loss greater than 1.3 MeV) does not work properly, so some response exists for electrons, and the exact gathering power for the light ions is not known. However, when hit levels are 3-fold, almost no protons above 60 MeV get detected and the channel response is mainly to alpha particles with energy above 50 MeV/n, with reduced efficiency above 500 MeV/n. In case of 1-fold hit levels, protons are detected with energies from 50 to 400 MeV along with >50 MeV/n alpha particles. Particles with greater Z have response from a higher cut-off energy onwards, e.g. E > 95 MeV/n for C-12 and E > 115 MeV/n for O-16. (4) These "electron channels" are primarily responding to high-energy protons, because the AC-scintillators have a poor response for fast, low Z particles. (5) Light/helium/heavy priority ion norm is used for normalizing the PHA observations (HEDyydoy.PL2 files). In order to get correct intensities, multiply the PHA intensity with the associated priority ion norm and pr correction factor (the correct priorities are given as fields for each PHA event in the PHA file). These factors are constant for each measurement period. In the PHA-files there is one record for each particle, thus including these factors there would result in a serious and unnecessary bloating of the amount of data. The priority norms, HEDl, HEDi, and HEDh, correct for the sampling that is due to the finite size of the telemetry buffer allocated for the PHA data. Light priority ion = hydrogen+helium (+identification errors in f10) Helium priority ion = helium only (+identification errors in f10) Heavy priority ion = heavier than helium Priority correction factors, Lpr2sr and Lpr1sr, correct for the total sampling (hardware + software) in the onboard analysis including intentional sampling and instrument and analysis dead time. 5. LED pulse height data file: LEDyydoy.PL2 =========================================== -------------------------------------------------------------------------------- # Label Format Contents Unit Note -------------------------------------------------------------------------------- 1 LOBT I10 seconds since 1.1.1958 2 ODC I2 Onboard data category (1) 3 PR I2 Priority number (2) 4 N1 I2 D1-detector number (1-7) 5 ED1 I7 energy loss in D1 keV 6 ED2 I8 energy loss in D2 keV 7 PN F5.1 Particle identification number -------------------------------------------------------------------------------- (1) Onboard data categories: 8: heavy priority ion 4: helium priority ion (also on-board identification errors in f10) 2 and 3: light priority ion (also on-board identification errors in f10) (2) Priority numbers: 1: helium or heavier 2: hydrogen isotope 6. HED pulse height data file: HEDyydoy.PL2 =========================================== One of the HED detector elements suffers from high noise from November 21 2000 onwards. This corrupts the S1X coordinates greater than 35 and the S1X pulse height for particles penetrating through that area. These particles are not included in the data. Due to the multiple hits caused by the noise and real particles the efficiency is further reduced. The combined effect reduces HED's response to 20% of the original. -------------------------------------------------------------------------------- # Label Format Contents Unit Note -------------------------------------------------------------------------------- 1 LOBT I10 seconds since 1.1.1958 2 ODC I2 Onboard data category (1) 3 PR I2 Priority number (2) 4 X1 I3 S1X-coordinate mm 5 Y1 I3 S1Y-coordinate mm 6 X2 I3 S2X-coordinate mm 7 Y2 I3 S2Y-coordinate mm 8 ES1X F8.2 energy loss in S1X MeV 9 ES1Y F8.2 energy loss in S1Y MeV 10 ES2X F8.2 energy loss in S2X MeV 11 ES2Y F8.2 energy loss in S2Y MeV 12 ED1 F8.2 energy loss in D1 MeV 13 ED2 F8.1 energy loss in D2 MeV 14 PN F5.1 Particle identification number -------------------------------------------------------------------------------- (1) Onboard data categories: 8: heavy priority ion 4: helium priority ion (also on-board identification errors in f10) 2 and 3: light priority ion (also on-board identification errors in f10) (2) Priority numbers: 1: helium or heavier 2: penetrating (not included in the PHA sample) 3: hydrogen isotope NOTE: The HED priority information is packed in the telemetry from format f40 and onwards. Earlier (f10) it was deduced from the pulse heights and didn't necessarily allways match the original on board value. 7. Revised energy ranges ======================== Energy ranges above were given in energies calculated by the onboard analysis with linear conversions from measured pulse heights to measured energy losses. Additionally, energy deposited in the thermal foil should be taken into account at energies below 6 and 60 MeV/n in LED and HED, respectively. In HED the CsI and BGO scintillators are wrapped into mylar and teflon, and the energy deposited in these passive layers should also be accounted for. The variations of geometric factor inside a channel influence the mean energy of the channels. The following tables includes these corrections for a flat spectrum. 7.1 Energies for the format f10 ------------------------------- In addition to the factors mentioned above, the onboard calibration parameters for hydrogen ions in D3-detector were slightly erraneous for f10, which has resulted in re-examination of the proton energy ranges for particles stopping in this detector. ------------------------------------------------------------------- Label Channel Width Energy GF Note [MeV/n] [MeV/n] [MeV/n] [cm**2 sr] ------------------------------------------------------------------- PL1 1.5 - 1.8 0.30 1.6 0.26 (1) PL2 1.8 - 2.2 0.39 2.0 0.26 PL3 2.2 - 2.7 0.50 2.4 0.26 PL4 2.7 - 3.3 0.63 3.0 0.55 PL5 3.3 - 4.1 0.81 3.7 0.92 (1) PL6 4.1 - 5.1 1.02 4.6 0.92 (1) PL7 5.1 - 6.4 1.30 5.8 0.92 (1) PL8 6.4 - 8.1 1.64 7.2 0.92 (1) PL9 8.1 - 10 2.07 9.1 0.92 (1) PL10 10 - 13 2.61 11 0.92 (1) PH1 14 - 17 3.0 15.4 31.4 PH2 17 - 22 5.4 18.9 25.2 PH3 21 - 28 7.1 23.3 20.4 (1) PH4 26 - 32 6.3 29.0 25.9 (1) PH5 32 - 40 8.1 36.4 25.8 (1) PH6 41 - 51 10.2 45.6 25.8 (1) PH7 51 - 67 16.5 54.1 8.5 (1,2) PH8 54 - 79 24.8 67.5 26.2 (1) PH9 79 - 114 34.3 94.0 23.0 (1) PH10 111 - 140 29.2 116 2.3 (1) AL1 1.5 - 1.8 0.30 1.6 0.26 AL2 1.8 - 2.2 0.39 2.0 0.26 AL3 2.2 - 2.7 0.50 2.4 0.26 AL4 2.7 - 3.3 0.63 3.0 0.65 AL5 3.3 - 4.1 0.81 3.7 0.92 AL6 4.1 - 5.1 1.02 4.6 0.92 AL7 5.1 - 6.4 1.30 5.8 0.92 AL8 6.4 - 8.1 1.64 7.2 0.92 AL9 8.1 - 10 2.07 9.1 0.92 AL10 10 - 13 2.61 11 0.92 AH1 14 - 17 3.0 15.4 31.4 AH2 17 - 22 5.4 18.9 25.2 AH3 21 - 28 7.1 23.3 20.4 AH4 26 - 32 6.3 29.0 25.9 AH5 32 - 40 8.1 36.4 25.8 AH6 41 - 51 10.2 45.6 25.8 AH7 51 - 67 16.5 57.4 21.8 AH8 64 - 80 16.3 72.0 28.5 AH9 80 - 101 20.7 90.5 26.3 AH10 101 - 131 29.4 108 9.3 ------------------------------------------------------------------- (1) These channels should be used only for 1-fold HIT levels. For 3-fold HIT levels, the effectivity is low and it has not been estimated. (2) This channel contains particles mainly from HED D2 detector and the wrappers below it. 7.2 Energies for the formats f40 and f50 ---------------------------------------- Since f40 the energy resolution of the on-board measurement was increased. The export channels are combined from three subchannels, weighing with theoretical statistics. The first channels (for both LED and HED) consist only of two subchannels. ------------------------------------------------------------------- Label Channel Width Energy GF Note [MeV/n] [MeV/n] [MeV/n] [cm**2 sr] ------------------------------------------------------------------- PL1 1.6 - 1.8 0.30 1.7 0.26 (1,2) PL2 1.8 - 2.2 0.39 2.0 0.26 PL3 2.2 - 2.7 0.50 2.4 0.26 PL4 2.7 - 3.3 0.63 3.0 0.26 PL5 3.3 - 4.1 0.81 3.7 0.26 (2) PL6 4.1 - 5.1 1.02 4.7 0.71 (2) PL7 5.1 - 6.4 1.30 5.7 0.73 (2) PL8 6.4 - 8.1 1.64 7.2 0.56 (2) PL9 8.1 - 10 2.07 9.1 0.40 (2) PL10 10 - 13 2.61 11 0.27 (2) PH1 14 - 17 3.0 15.4 29.1 PH2 17 - 22 5.4 18.9 25.8 PH3 21 - 28 7.1 23.3 23.1 (2) PH4 26 - 32 6.3 29.1 26.3 (2) PH5 32 - 40 8.1 36.4 25.5 (2) PH6 40 - 51 10.2 45.6 25.8 (2) PH7 51 - 67 16.5 57.4 21.7 (2) PH8 64 - 80 16.3 72.0 28.6 (2) PH9 80 - 101 20.7 90.5 25.7 (2) PH10 101 - 131 29.4 108 9.2 (2) AL1 1.6 - 1.8 0.30 1.7 0.26 AL2 1.8 - 2.2 0.39 2.0 0.26 AL3 2.2 - 2.7 0.50 2.4 0.26 AL4 2.7 - 3.3 0.63 3.0 0.26 AL5 3.3 - 4.1 0.81 3.7 0.26 AL6 4.1 - 5.1 1.02 4.6 0.82 AL7 5.1 - 6.4 1.30 5.8 0.66 AL8 6.4 - 8.1 1.64 7.2 0.66 AL9 8.1 - 10 2.07 9.1 0.66 AL10 10 - 13 2.61 11 0.66 AH1 14 - 17 3.0 15.4 29.1 AH2 17 - 22 5.4 18.9 23.7 AH3 21 - 28 7.1 23.2 22.6 AH4 26 - 32 6.3 29.1 26.3 AH5 32 - 40 8.1 36.4 25.5 AH6 44 - 51 7.0 47.2 25.8 (3) AH7 51 - 67 16.5 57.6 20.6 AH8 64 - 80 16.3 72.0 28.6 AH9 80 - 101 20.7 90.5 25.7 AH10 101 - 131 29.4 108 9.2 ------------------------------------------------------------------- (1) This channel is composed from two subchannels, the lower of which measures with about 80% efficiency, because of treshold effects. The efficiency of the combined channel is 0.9. This has been corrected for in the tabulated intensity values. (2) These channels should be used only for 1-fold HIT levels. For 3-fold HIT levels, the effectivity is very low and it has not been estimated. (3) The first subchannel in this channel has been excluded, as its efficiency suffers from gain selection error. Thus the channel starts from 44 MeV/n instead of continuing from channel AH5 endpoint.