Changes for page MTCA ADCs

Last modified by sndueste on 2024/07/08 09:50
From version 28.1
edited by sndueste
on 2024/03/13 14:24
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To version 1.1
edited by sendels
on 2019/05/09 14:53
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1 -Content:
2 -
3 -
4 -
5 -{{toc minLevel="2"/}}
6 -
7 -----
8 -
9 -= Our ADC cards =
10 -
11 -== GHz ADCs: SP-Devices ADQ412AC ==
12 -
13 -We have ADQ412AC-4G-MTCA digitizer cards for the experiment crates (Exp1, Exp2 and FL2Exp1):
14 -[[ADQ412_datasheet.pdf>>attach:10-0494_C_ADQ412_datasheet.pdf]] ( [[new version>>attach:10-0494-adq412_datasheet.pdf]], [[sampling rates table>>attach:Clocking_AppNote.pdf]])
15 -The cards are connected via Patch panels to the Experimental endstations and can be operated with a jddd panel:
16 -
17 -[[image:attach:image2019-10-21_15-21-23.png||width="800"]]
18 -
19 -
20 -
21 -* **NOTE: between ADC and Patch panel we have installed an [[EMP protector>>attach:EMP_protector.pdf]] and an additional 1dB attenuator**
22 -* for the influence of the Patch cable and the EMP protector see also [[this logbook entry~[~[image:url:http://hasfweb.desy.de/pub/TWiki/TWikiDocGraphics/external-link.gif~|~|height="12" width="13"~]~]>>url:http://ttfinfo.desy.de/ExpHallelog/show.jsp?dir=/2016/27/08.07&pos=2016-07-08T17:41:07||shape="rect"]]
23 -
24 -
25 -(% class="wrapped" %)
26 -|(((
27 -Impedance AC
28 -)))|(((
29 -50 OHM
30 -)))
31 -|(((
32 -Input voltage range
33 -)))|=(((
34 -the complete range is about 1V  for 4096 counts.
35 -
36 -Thus +- 0.5 V for baseline at 0V
37 -
38 -BUT the baseline can also be shifted ...
39 -)))
40 -|(((
41 -Digitizer resolution
42 -)))|(((
43 -12 bit
44 -)))
45 -
46 -4 CHANNELS MODE
47 -
48 -(% class="wrapped" %)
49 -|(((
50 -Sampling rate
51 -)))|(((
52 -2 *
53 -)))|(((
54 -GSPS
55 -)))
56 -|(((
57 -Analog bandwidth
58 -)))|(((
59 -2
60 -)))|(((
61 -GHz
62 -)))
63 -
64 -2 CHANNELS MODE
65 -
66 -(% class="wrapped" %)
67 -|(((
68 -Sampling rate
69 -)))|(((
70 -4 *
71 -)))|(((
72 -GSPS
73 -)))
74 -|(((
75 -Analog bandwidth
76 -)))|(((
77 -1.3
78 -)))|(((
79 -GHz
80 -)))
81 -
82 - ~* note that the sample rate is NOT locked to the FLASH repetition rate ! Thus there is a not integer number of samples between FLASH pulses. The sample rate also differs slightly from ADC card  to ADC card. The rough spacing is **1993.846** samples between 2 pulses at 1 MHz for details ask the local contact.
83 -
84 -
85 -===== ADC and DOOCS / DAQ =====
86 -
87 -The HDF5 names for the ADC traces are depending on the beamline :
88 -\\PG Beamline:
89 -{{code language="none"}}/FL1/Experiment/PG/ADQ412 GHz ADC/CH00/TD{{/code}}
90 -{{code language="none"}}/FL1/Experiment/PG/ADQ412 GHz ADC/CH01/TD{{/code}}
91 -{{code language="none"}}/FL1/Experiment/PG/ADQ412 GHz ADC/CH02/TD{{/code}}
92 -{{code language="none"}}/FL1/Experiment/PG/ADQ412 GHz ADC/CH03/TD{{/code}}
93 -
94 -BL Beamlines:
95 -{{code language="none"}}/FL1/Experiment/BL1/ADQ412 GHz ADC/CH00/TD{{/code}}
96 -{{code language="none"}}/FL1/Experiment/BL1/ADQ412 GHz ADC/CH01/TD{{/code}}
97 -{{code language="none"}}/FL1/Experiment/BL1/ADQ412 GHz ADC/CH02/TD{{/code}}
98 -{{code language="none"}}/FL1/Experiment/BL1/ADQ412 GHz ADC/CH03/TD{{/code}}
99 -\\{{code language="none"}}/FL1/Experiment/BL2/ADQ412 GHz ADC/CH00/TD{{/code}}
100 -{{code language="none"}}/FL1/Experiment/BL2/ADQ412 GHz ADC/CH01/TD{{/code}}
101 -\\{{code language="none"}}/FL1/Experiment/BL3/ADQ412 GHz ADC/CH02/TD{{/code}}
102 -{{code language="none"}}/FL1/Experiment/BL3/ADQ412 GHz ADC/CH03/TD{{/code}}
103 -
104 -and at FLASH2
105 -
106 -
107 -
108 -\\\\\\{{code language="none"}}FL24:/FL2/Experiment/MTCA-EXP1/ADQ412 GHz ADC/CH00/TD/FL2/Experiment/MTCA-EXP1/ADQ412 GHz ADC/CH01/TD/FL2/Experiment/MTCA-EXP1/ADQ412 GHz ADC/CH02/TD/FL2/Experiment/MTCA-EXP1/ADQ412 GHz ADC/CH03/TD{{/code}}
109 -
110 -
111 -DOOCS prop : {{code language="none"}}FLASH.FEL/ADC.ADQ.PG/EXP1.CH00/CH00.TD  or CH00.DAQ.TD{{/code}}
112 -here the {{code language="none"}}CH00.TD{{/code}} is the full ADC trace as it is sampled ( typically several 100.000 samples per pulse train) while the {{code language="none"}}CH00.DAQ.TD{{/code}} trace only has the number of samples which are sent to the DAQ OR if //grouping// is activated the {{code language="none"}}CH00.DAQ.TD{{/code}} contains only the grouped spectra. To read the ADC trace with an online analysis program the {{code language="none"}}CH00.DAQ.TD{{/code}} is preferable to use ...
113 -DAQ channel: {{code language="none"}}FLASH.FEL/ADC.ADQ.PG/EXP1.CH00{{/code}}
114 -
115 -in addition there are also additional parameters saved like:
116 -
117 -* sample frequency (in MHz)
118 -* error (state)
119 -* offset
120 -
121 -
122 -== Amplifiers for the GHZ ADCs ==
123 -
124 -* **we can offer [[ Phillips scientific Model 6954>>attach:6954ds.pdf]] amplifiers** to either amplify small signals or to decouple setups which may deliver voltage peaks fro the ADCs.
125 -* The available ADCs 5x, 10x, 20 x 50x and 100x
126 -* The ADCs can be borrowed from Markus Braune
127 -* The Amplifiers fit perfectly to the dynamic range of the GHz ADCs - here a  [[ test of the Phillips scientific amplifier>>attach:Model_6954_Amplifier_Report.pdf]]
128 -* There are also [[BiasTs>>attach:ZX85-12G-S+.pdf]] available that can be borrowed  ([[link to internal page>>doc:FLASH.Bias T]])[[image:url:https://confluence.desy.de/download/attachments/177857419/20210414_161820.jpg?version=5&modificationDate=1618412745169&api=v2||alt="20210414_161820.jpg" thumbnail="true" height="250" width="333"]]
129 -
130 -
131 -== 108 MHz ADCs:  Struck SIS8300-L2D ==
132 -
133 -There is one in each of the MTCAs in the hall: MTCA-EXP1 at PG/BL1, the other at BL2 and BL3.
134 -
135 -They are 16 bit, 10 channel, 125 MS/s ADCs.  Here is a link to the [[Struck website>>url:https://www.struck.de/sis8900.html||shape="rect"]]
136 -
137 -
138 -50 Ohm input impedance, -1 V,...,+1 V default input range, analog signals can be routed to AC and DC input stage. The coupling is DC via op-amp (switching to AC transformer involves resoldering of SMD solder bridges).
139 -
140 -Here is a trace of the first signal, a 1 MHz trigger connected from the x2timer board in the same MTCA:
141 -
142 -[[image:attach:adc_mhz.jpg||height="400"]]
143 -
144 -
145 -== Pulse energy server: Using the Struck SIS8300-L2D to detect only integrated values of pulses ==
146 -
147 -FS-LA (Falko Peters) programmed a pulse detection server that automatically detects peaks in the signal and integrates the samples around the peak.
148 -
149 -Things to set:
150 -
151 -* Min peak height: threshold fro which on some signal is considered to be a peak. The actual peak is then determined as the maximum of the counts after the threshold
152 -* pre and post peak integration time: how much ns to be integrated before and after the peak sample that are taken into account for the peak
153 -* pre and post peak noise time: before and after the samples that are taken for the actual signal these samples are used as background ( they also can be used to define the "deadtime" of the detector before it searches for new peaks.
154 -
155 -
156 -
157 -
158 -[[image:attach:pulse_energy_server.jpg||height="400"]] [[image:attach:image2019-11-18_17-9-7.png||height="400"]]
159 -
160 -
161 - jddd  server panel  Definition of the parameters
162 -
163 -
164 -
165 -
166 -== Detailed expert stuff ==
167 -
168 -* [[ a collection of usefull things related to the OPIS ADCs>>doc:FLASH.OPIS ADC related things]]
169 -* a list of [[doc:FLASH.our MTCA ADC cards]] (only internal link)
170 -* load tests: [[link to Logbook entry>>url:https://ttfinfo.desy.de/Flash2_FL26elog/show.jsp?dir=/2023/23&pos=2023-06-08T16:11:08||shape="rect"]]  for the "mobile GHz ADC" we can save 12 ADCs with 1.8 Gsample  for  333 µm / 600 ksamples  without losses -  but it produces looooots of data ..
171 -
172 -
173 -
174 -
10-0494-adq412_datasheet.pdf
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6954ds.pdf
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ACA-amilifier.pdf
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Clocking_AppNote.pdf
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EMP_protector.pdf
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Model_6954_Amplifier_Report.pdf
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Output_behaviour_of_Mini-Circuits_Amplifier.pdf
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ZFL-1000LN.pdf
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