Differences

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--- event_filter [2015/10/30 16:25]
pereira [Scintillator packet]
+++ event_filter [2015/10/30 18:47]
pereira [CRDC packets]
@@ Line 8: / Line 8: @@
 ==== Time-stamp packet ====
-The timestamp is coded by the [[S800 USB DAQ data format#Tag 0x5803: XLM72 time stamp module|XLMV72 time-stamp module]] for each event as a 64-bit word. The Event Filter parses it as a set of four consecutive 16-bit words.
+The timestamp is encoded in the [[S800 USB DAQ data format#Tag 0x5803: XLM72 time stamp module|XLMV72 time-stamp module]] for each event as a 64-bit word. The Event Filter parses it as a set of four consecutive 16-bit words.
@@ Line 103: / Line 103: @@
   * **Packet Length** (self-inclusive)
-^    from 2 to 7    ^^^^^^^^^^^^^^^|
+^    A number from 2 to 7    ^^^^^^^^^^^^^^^|
 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | X | X | X |
 | 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
@@ Line 157: / Line 157: @@
   * **Packet Length** (self-inclusive)
-^    from 2 to 10    ^^^^^^^^^^^^^^^|
+^    A number from 2 to 10    ^^^^^^^^^^^^^^^|
 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | X | X | X |
 | 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
@@ Line 195: / Line 195: @@
 ==== Scintillator packet ====
-The scintillator packet includes the energy (encoded in the [[S800 USB DAQ data format#Tag 0x4300: FERA module for plastic scintillator energies|FERA LeCroy module]]) and time (encoded in the [[S800 USB DAQ data format#Tag 0x7186: Phillips 7186 TDC module for time-of-flights|Phillips TDC]]) of the S800 FP scintillator signals. In the original configuration, there were 3 scintillators (E1, E2, and E3) which were later reduced to just one (E1) after the installation of the Hodoscope.
+The scintillator packet includes the energy (encoded in the [[S800 USB DAQ data format#Tag 0x4300: FERA module for plastic scintillator energies|FERA LeCroy module]]) and time (encoded in the [[S800 USB DAQ data format#Tag 0x7186: Phillips 7186 TDC module for time-of-flights|Phillips TDC]]) of the [[Detectors#Plastic scintillators|S800 FP scintillator]] signals. In the original configuration, there were 3 scintillators (E1, E2, and E3) which were later reduced to just one (E1) after the installation of the Hodoscope.
   * **Packet Length** (self-inclusive)
-^    from 4 to 8    ^^^^^^^^^^^^^^^|
+^    A number from 4 to 8    ^^^^^^^^^^^^^^^|
 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | X | X | X | X |
 | 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
@@ Line 240: / Line 240: @@
 ==== Ion-Chamber packet ====
-The Ion-chamber packet includes the energies of the 16 "sub-chambers" registered by a Phillips 7164H ADC.
+The Ion-chamber packet includes the energies of the [[Detectors#Ionization chamber|16 ion-chamber segments]] encoded in one of the [[S800 USB DAQ data format#Tag 0x7164: Phillips 7164 ADC module for ion chamber energies|Phillips 7164H ADC]].
   * **Packet Length** (self-inclusive)
-^    from 4 to 18    ^^^^^^^^^^^^^^^|
+^    A number from 4 to 18    ^^^^^^^^^^^^^^^|
 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | X | X | X | X | X |
 | 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
@@ Line 278: / Line 278: @@
 The energy (from the Phillips 7164H ADC module) is given by a series of words that look like:
-^  ^^^ Ch ^ energy  ^^^^^^^^^^^|
+^  ^^^ Ch ^   energy   ^^^^^^^^^^^|
 | 0 | 0 | 0 | X | X | X | X | X | X | X | X | X | X | X | X | X |
 | 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
-Where Ch is the "sub-chamber" number (the ion-chamber is made out of 16 "sub-chambers"). The Filter gives an energy word for each "sub-chamber", as long as **energy** is greater than 0.
+Where Ch is the segment number (from 0 to 15, being segment 0 the most upstream). The Filter gives an energy word for each segment as long as **energy** is greater than 0.
+==== CRDC packets ====
+The Filter provides two CRDC packets: one for [[Detectors|Cathode Readout Drift Chambers (CRDC)|CRDC1]] and one for [[Detectors|Cathode Readout Drift Chambers (CRDC)|CRDC2]]. Each CRDC packet is divided in two sub-packets: the "Raw" sub-packet with information about the pads energies (encoded in the [[S800 USB DAQ data format#Tag 0xCFDC: XLM72V crdc1 pad readout module|CRDCs XLM72 modules]]), and the "Anode" sub-packet with anode energy and time information encoded in the CRDCs [[S800 USB DAQ data format#Tag 0x7167: Phillips 7164 ADC module for CRDC anodes (energies and TAC)|Phillips ADC]]. In the following, we describe the structure of the packet provided by the Filter for each CRDC.
+  * **Packet Length** (self-inclusive)
+^    A number from 4 to 18    ^^^^^^^^^^^^^^|
+| 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | X | X | X | X | X |
+| 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
+  * **Packet Tag**
+^    0x5840    ^^^^^^^^^^^^^^^|
+| 0 | 1 | 0 | 1 | 1 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 |
+| 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
+  * **CRDC label**
+^    0x0000 or 0x0001   ^^^^^^^^^^^^^^^|
+| 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | X |
+| 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
+where 0x0000 and 0x0001 identify CRDC1 and CRDC2, respectively.
+  * **CRDC Sub-packet "Raw" Length** (self-inclusive)
+^    from 2 to 16    ^^^^^^^^^^^^^^^|
+| 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | X | X | X | X | X |
+| 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
+  * **CRDC Sub-packet "Raw" Tag**
+^    0x5841    ^^^^^^^^^^^^^^^|
+| 0 | 1 | 0 | 1 | 1 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 1 |
+| 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
+  * **Dummy word**
+^    0x0000    ^^^^^^^^^^^^^^^|
+| 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
+| 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
+This word is reserved for a global threshold, which is no longer used.
+  * **Samples sub-packets**
+The Filter sends a series of sample sub-packets. Each sub-packet consists of two parts. The first part includes one 16-bit word with information about the **sample** and **channel** numbers:
+^  control bit  ^   sample    ^^^^^^^^^   channel   ^^^^^|
+| 1 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X |
+| 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
+where **channel** is a number between 0 and 63, and refers to a group of four pads. The second part includes __up to four__ consecutive 16-bit words, each with a pad energy __greater than 0__:
+^  control bit  ^  empty  ^^^  connector  ^^  energy  ^^^^^^^^^|
+| 0 | 0 | 0 | 0 | X | X | X | X | X | X | X | X | X | X | X | X |
+| 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
+The **connector** number is related to the pad number (**pad**) according to: **pad** = **channel** + **connector** x 64 (where **connector** ranges from 0 to 3, and **channel** is given by the first word of the sample sub-packet). Note that the Filter processes information from connectors with energies greater than 0.
+  * **CRDC Sub-packet "Anode" Length** (self-inclusive)
+^    4    ^^^^^^^^^^^^^^^|
+| 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 |
+| 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
+  * **CRDC Sub-packet "Anode" Tag**
+^    0x5845    ^^^^^^^^^^^^^^^|
+| 0 | 1 | 0 | 1 | 1 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 1 | 0 | 1 |
+| 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
+  * **Energy from Anode**
+The anode energy (encoded in the Phillips 7164H ADC module) is given by:
+^  ^^^ Ch ^   energy   ^^^^^^^^^^^|
+| 0 | 0 | 0 | X | X | X | X | X | X | X | X | X | X | X | X | X |
+| 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
@@ Line 302: / Line 405: @@
 | 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
 | 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |

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