Changes for page MTCA ADCs

Last modified by sndueste on 2024/07/08 09:50
From version 1.1
edited by sendels
on 2019/05/09 14:53
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To version 28.1
edited by sndueste
on 2024/03/13 14:24
Change comment: There is no comment for this version

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1 -XWiki.sendels
1 +XWiki.sndueste
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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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ZX85-12G-S+.pdf
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adc_mhz.jpg
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