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Changes for page Gotthard related stuff

Last modified by sndueste on 2025/08/22 10:41
From version 8.1
edited by palutke
on 2023/06/08 14:23
Change comment: There is no comment for this version
To version 20.1
edited by sndueste
on 2025/08/22 10:41
Change comment: There is no comment for this version

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1 +FLASHUSER.Misc.jddd-linked help pages.WebHome
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1 -XWiki.palutke
1 +XWiki.sndueste
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1 -== Info related to the Detector ==
1 +== page content: ==
2 2  
3 -\\
3 +{{toc maxLevel="2"/}}
4 4  
5 +
6 +== Info collection related to the Detector ==
7 +
5 5  * [[Data sheet of a macro objective>>attach:MP-E_65mm_F2.8_1-5x_Instruction_DE.pdf]]
6 6  * [[FLASH-GH-Meeting_10.10.2014.pdf by Steffen>>attach:FLASH-GH-Meeting_10.10.2014.pdf]]
7 7  * [[attach:READ_ME_GOTTHARD_detector.pdf]]: READ_ME_GOTTHARD_detector.pdf (Server information is outdated, see below)
11 +* some investigation related to read out noise for different exposure times [[attach:GOTTHARD noise evaluation and exposure time dependence (002).pdf]]
8 8  
9 -\\
10 10  
11 -Ethernet connections:
12 12  
13 -(% style="list-style-type: square;" %)
15 +Ethernet and trigger  connections:
16 +
17 +[[image:attach:20230922_161707_resized.jpg||thumbnail="true" height="250"]]
18 +
19 +(% style="list-style-type:square" %)
20 +* trigger at port 1
14 14  * gbit port  <~-~-->  Server PC (hasfl2det01 at FLASH2, no server currently at FLASH1)
15 15  * base-T     <~-~-->  Office net
16 16  
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18 18  
19 19  for now very short: run the Exp2 DAQ with EXPERIMENT_GOTTHARD included as shown below. AND press the start button in the Gotthard DAQ (you get there from the Gotthard panel lower left button "Gotthard DAQ"
20 20  
21 -\\
22 22  
23 23  * Main Gotthard panel for users :
24 24  
25 25  [[image:attach:Clipboard05.gif||height="400"]]
26 -\\
32 +
27 27  
28 -\\
29 29  
30 30  * Exp2 DAQ RC gui for recording Gotthard data. EXPERIMENT_GOTTHARD has to be included
31 31  
32 32  [[image:attach:Clipboard01.gif||height="400"]]
33 33  
34 -\\
35 35  
40 +
41 +== Operation hints (June 2023): ==
42 +
43 +(% style="list-style-type:square" %)
44 +* **Where is the GOTTHARD GUI:** FLASH2 - Panel: Infrastructure tab → Miscellaneous tab → FLASH2 GOTTHARD ctrl button
45 +* **Never change a running system:** Do not change parameters while the Detector is running/taking data, The detector will crash.
46 +* Furthermore the module will crash if recieving to much light (e.g. illuminating with flash light during data dating.
47 +* **Checking/switching server:** The server is reachable from the GOTTHARD GUI (lower left corner find the status of the server PC "hasfl2det01") click it to open server/watchdog control. The server is otherwise found under FLASH.SYSTEM → HASFL2DET01.WATCH. Open control of SVR.GOTTHARD (for start/stop/reboot)
48 +
49 +(% style="list-style-type:square" %)
50 +* **Robooting the GOTTHARD** (if it has crashed): 
51 +(% style="list-style-type:square" %)
52 +** soft reboot: 1. open console on linux DESY PC, 2. type "telnet (Hostname/IP)" e.g. "telnet cfeld-gotthard02" , 3. you are logged on the GOTTHARD module as /root, type "reboot", 4. wait until server/GUI has reconnected to the module
53 +** hard reset: power down the GOTTHARD, wait some seconds, Repower the module, wait for reconnection to server/GUI
54 +* **In case of a crashes** (no data taking, no reaction on input: Reboot the detector) or if GUI input returns error: Check connection (Power/Data), check GOTTHARD server
55 +* **Permantent operation:** Activate check box for continous run to trigger automated restart of the module after reaching the set number of short or after sefl-stopping due to hickups. The restart needs about 1-2 seconds. During this time no data is taken.
56 +* **Background**: Check "Take" stores the actual detector image~: Uncheck this again. Than this stored image is online subtracted from all images in the GUI when checking "subtract". The DAQ only stores raw data (NOT the background subtracted images)
57 +
58 +Using burst mode (standard operation as of June 2023)
59 +
60 +(% style="list-style-type:square" %)
61 +* Do not change the delay in the GOTTHARD GUI. The Alignment to the FEL pulses are done by adjusting the FLASH trigger: FL2EXP1/RTM.TRG6, it can be opened from the GOTTHARD GUI or from FLASH2 → Beamlines → FL26 → Exp. control → Patch Panel26-2 → MTCA Trigger 2
62 +* Exposure range is 2**00ns <  Exposure < ~~1/3 * Frame periode**
63 +* The periode is:** 9968ns for 100kHz, 4984 for 200kHz, 1993 for 500kHz**
64 +* The number of** frames must be lower than 125, for stable operation 120**
65 +* Number of Shots: Number of trigger events before self stopping, select large number for permanent operation
66 +
36 36  == Modules and their exchange ==
37 37  
38 38  Two (Three) modules available (physically at FLASH):
39 39  
40 -(% class="wrapped relative-table" style="width: 64.2451%;" %)
71 +(% class="relative-table wrapped" style="width:64.2451%" %)
41 41  |=(((
42 42  hostname
43 43  )))|=(((
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48 48  Sensor image
49 49  )))|=(((
50 50  config file
82 +)))|=(% colspan="1" %)(((
83 +DOOCS address (status 2023)
51 51  )))
52 52  |(((
53 53  cfeld-gotthard02
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65 65  )))
66 66  )))|(((
67 67  bchip_mpc1922Receiver.config_cfeld-gotthard02
101 +)))|(% colspan="1" %)(((
102 +FLASH.FEL/GOTTHARD/FL2/
68 68  )))
69 69  |(((
70 70  hasdslabgh
106 +
107 +"gotthard dgt01"
71 71  )))|(((
72 72  working
73 73  )))|(((
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79 79  )))
80 80  )))|(((
81 81  bchip_mpc1922Receiver.config
119 +)))|(% colspan="1" %)(((
120 +FLASH.FEL/GOTTHARD2/FL2/
82 82  )))
83 83  |(((
84 84  cfeld-gotthard01
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87 87  )))|(((
88 88  ?
89 89  )))|(% colspan="1" %)(((
90 -\\
129 +
91 91  )))|(((
92 92  bchip_mpc1922Receiver_petra.config
132 +)))|(% colspan="1" %)(((
133 +
93 93  )))
94 94  
95 -\\
96 96  
137 +
97 97  To change a module the respective config file has to be selected. However changing it will crash the server, thus, it is not possible to change on the fly. Connact Sören if there is the need to exchange a module. However, the differences in the configs are only the hostname. (**To be tested: On the fly might work, if one edits the config-file itself after switching of the server instead of selecting another config file in the GUI. But how to transport this information to the GUI? → Display the first line of the config file!**) The config files are located at the **hasfl2det01: /export/doocs/server/gotthard_server/cfgs/**
98 98  
99 -\\
100 100  
101 101  == GOTTHARD Server ==
102 102  
103 -The server for GOTTHARD (FLASH2) runs on **hasfl2det01**. Its watchdog and control (svr.GOTTHARD) can be found under** FLASH.SYSTEMS - HASFL2DET01.**
143 +The server for GOTTHARD (FLASH2) runs on **hasfl2det01**. Its watchdog and control (svr.GOTTHARD) can be found under** FLASH.SYSTEMS - HASFL2DET01.**
104 104  
105 -\\
106 106  
107 107  == Main Parameters and limits ==
108 108  
148 +(% class="wrapped" %)
109 109  |=(((
110 110  Parameter
111 111  )))|=(((
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125 125  )))|(((
126 126  ~~2/3 of period time
127 127  )))|(% colspan="1" %)(((
128 -\\
168 +
129 129  )))
130 130  |(((
131 131  Min. period time
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132 132  )))|(((
133 133  ca. 930 ns
134 134  )))|(% colspan="1" %)(((
135 -\\
175 +
136 136  )))
137 137  |(((
138 138  Max repetition frequ.
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142 142  833 kHz (software limited)
143 143  )))
144 144  
145 -\\
146 146  
186 +
147 147  == Soft reset a GOTTHARD Module ==
148 148  
149 -(% style="list-style-type: square;" %)
189 +(% style="list-style-type:square" %)
150 150  * Open console on Linux PC (connected to DESY net)
151 151  * write "telnet cfeld-gotthard02" (or the respective Host name or IP of the module)
152 -(% style="list-style-type: square;" %)
192 +(% style="list-style-type:square" %)
153 153  ** you should be connected to the GOTTHARD onboard system → </root:
154 154  * type: "reboot"
155 -(% style="list-style-type: square;" %)
195 +(% style="list-style-type:square" %)
156 156  ** the module reboots (wait ~~1-2 min), the telnat connection will be cut due to reboot.
197 +
198 +
199 +
200 +== Triggering the Gotthard with a burst trigger ==
201 +
202 +it is also possible to trigger the Gotthard not only with 10 Hz but with a burst trigger
203 +
204 +here are some Info from PIS (June 2023)
205 +
206 +
207 +
208 +{{view-file att--filename="Flash_G1.pdf" height="250"/}}
209 +
210 +I think one does not need to set it in GUI when running in continuous mode. In G1, whether the detector is running in burst or continuous mode depends on the setting of the "number of frames" in trigger mode. If the number of frames sets to 1, it will be in continuous mode (1 trigger -> 1 frame).
211 +
212 +Since G1 accepts triggers from the lemo connector, one can also use the bunch train trigger. The spacing of the trigger train needs to be larger than 3.2 ms, which is the readout time of G1.
213 +
214 +Regarding the detector setting (assuming it is 200 kHz pulse rate, 100 pulses per train):
215 +
216 +* timing mode: trigger
217 +* number of frames: 1
218 +* number of triggers:  M x N (M is the number of trains and N is the pulses per train, one can also take a bit more frames per train to track the pedestal/dark)
219 +* period: < 5 us (1/200 kHz = 5 us, the period needs to be slightly smaller than 5 us since the detection of the trigger only starts after the period is reached)
220 +* exposure time: > 93 ns and smaller than period
221 +
222 +Alignment: One of the four lemo connectors on G1 outputs its exposure window. Using an oscilloscope, one can use a photodiode under the beam and align the pulses from the diode and the exposure window of G1 by fine tuning the exposure time of G1 and/or the setting of "delay after trigger" from the detector, or "delay time" of the wave-generator (if a wave-generator is used to generate the triggers for every pulse). After this, one can do a fine scan of trigger delay to find an optimal setting with highest signal after putting G1 under the beam.
223 +
224 +
225 +by:
226 +
227 +Dr. Jiaguo Zhang
228 +
229 +Paul Scherrer Institut
230 +
231 +Forschungsstrasse 111
232 +
233 +5232 Villigen PSI
234 +
235 +Switzerland
236 +
237 +
238 +== Using the Spectralyzer together with Gotthard ==
239 +
240 +one needs spectralyzer 0.2.4 or newer
241 +
242 +
243 +start spectralyzer on one of our consoles ( works for fl24 and fl26user )  (for installing new version or for other users .. ask Christopher Behrens... )
244 +
245 +(% class="code" %)
246 +(((
247 +fl26user@hasfcons1:~~$ mamba activate spectralyzer
248 +(spectralyzer) fl26user@hasfcons1:~~$ spectralyzer
249 +)))
250 +
251 +
252 +[[image:url:https://ttfinfo.desy.de/Flash2_FL26elog/data/2023/06/2023-02-10T16:03:53-00.jpg||height="250"]]
253 +
254 +[[image:attach:image2023-9-15_11-16-3.png||height="400"]]
255 +
256 +
257 +
258 +
259 +
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Flash_G1.pdf
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GOTTHARD noise evaluation and exposure time dependence (002).pdf
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