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
Change comment: There is no comment for this version
To version 26.1
edited by sndueste
on 2023/04/28 11:17
Change comment: There is no comment for this version

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Author
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1 -XWiki.sendels
1 +XWiki.sndueste
Content
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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 +\\
22 +
23 +* **NOTE: between ADC and Patch panel we have installed an [[EMP protector>>attach:EMP_protector.pdf]] and an additional 1dB attenuator**
24 +* 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~|~|width="13" height="12"~]~]>>url:http://ttfinfo.desy.de/ExpHallelog/show.jsp?dir=/2016/27/08.07&pos=2016-07-08T17:41:07||shape="rect"]]
25 +
26 +\\
27 +
28 +(% class="wrapped" %)
29 +|(((
30 +Impedance AC
31 +)))|(((
32 +50 OHM
33 +)))
34 +|(((
35 +Input voltage range
36 +)))|=(((
37 +the complete range is about 1V  for 4096 counts.
38 +
39 +Thus +- 0.5 V for baseline at 0V
40 +
41 +BUT the baseline can also be shifted ...
42 +)))
43 +|(((
44 +Digitizer resolution
45 +)))|(((
46 +12 bit
47 +)))
48 +
49 +4 CHANNELS MODE
50 +
51 +(% class="wrapped" %)
52 +|(((
53 +Sampling rate
54 +)))|(((
55 +2 *
56 +)))|(((
57 +GSPS
58 +)))
59 +|(((
60 +Analog bandwidth
61 +)))|(((
62 +2
63 +)))|(((
64 +GHz
65 +)))
66 +
67 +2 CHANNELS MODE
68 +
69 +(% class="wrapped" %)
70 +|(((
71 +Sampling rate
72 +)))|(((
73 +4 *
74 +)))|(((
75 +GSPS
76 +)))
77 +|(((
78 +Analog bandwidth
79 +)))|(((
80 +1.3
81 +)))|(((
82 +GHz
83 +)))
84 +
85 + ~* 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.
86 +
87 +\\
88 +
89 +===== ADC and DOOCS / DAQ =====
90 +
91 +The HDF5 names for the ADC traces are depending on the beamline :
92 +\\PG Beamline:
93 +{{code language="none"}}/FL1/Experiment/PG/ADQ412 GHz ADC/CH00/TD{{/code}}
94 +{{code language="none"}}/FL1/Experiment/PG/ADQ412 GHz ADC/CH01/TD{{/code}}
95 +{{code language="none"}}/FL1/Experiment/PG/ADQ412 GHz ADC/CH02/TD{{/code}}
96 +{{code language="none"}}/FL1/Experiment/PG/ADQ412 GHz ADC/CH03/TD{{/code}}
97 +
98 +BL Beamlines:
99 +{{code language="none"}}/FL1/Experiment/BL1/ADQ412 GHz ADC/CH00/TD{{/code}}
100 +{{code language="none"}}/FL1/Experiment/BL1/ADQ412 GHz ADC/CH01/TD{{/code}}
101 +{{code language="none"}}/FL1/Experiment/BL1/ADQ412 GHz ADC/CH02/TD{{/code}}
102 +{{code language="none"}}/FL1/Experiment/BL1/ADQ412 GHz ADC/CH03/TD{{/code}}
103 +\\{{code language="none"}}/FL1/Experiment/BL2/ADQ412 GHz ADC/CH00/TD{{/code}}
104 +{{code language="none"}}/FL1/Experiment/BL2/ADQ412 GHz ADC/CH01/TD{{/code}}
105 +\\{{code language="none"}}/FL1/Experiment/BL3/ADQ412 GHz ADC/CH02/TD{{/code}}
106 +{{code language="none"}}/FL1/Experiment/BL3/ADQ412 GHz ADC/CH03/TD{{/code}}
107 +
108 +and at FLASH2
109 +
110 +
111 +\\\\\\\\{{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}}
112 +
113 +\\
114 +
115 +DOOCS prop : {{code language="none"}}FLASH.FEL/ADC.ADQ.PG/EXP1.CH00/CH00.TD  or CH00.DAQ.TD{{/code}}
116 +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 ...
117 +DAQ channel: {{code language="none"}}FLASH.FEL/ADC.ADQ.PG/EXP1.CH00{{/code}}
118 +
119 +in addition there are also additional parameters saved like:
120 +
121 +* sample frequency (in MHz)
122 +* error (state)
123 +* offset
124 +
125 +\\
126 +
127 +== Amplifiers for the GHZ ADCs ==
128 +
129 +* **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.
130 +* The available ADCs 5x, 10x, 20 x 50x and 100x
131 +* The ADCs can be borrowed from Markus Braune
132 +* 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]]
133 +* 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||thumbnail="true" alt="20210414_161820.jpg" height="150"]]
134 +
135 +\\
136 +
137 +== 108 MHz ADCs:  Struck SIS8300-L2D ==
138 +
139 +There is one in each of the MTCAs in the hall: MTCA-EXP1 at PG/BL1, the other at BL2 and BL3.
140 +
141 +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"]]
142 +
143 +\\
144 +
145 +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).
146 +
147 +Here is a trace of the first signal, a 1 MHz trigger connected from the x2timer board in the same MTCA:
148 +
149 +[[image:attach:adc_mhz.jpg||height="400"]]
150 +
151 +\\
152 +
153 +== Pulse energy server: Using the Struck SIS8300-L2D to detect only integrated values of pulses ==
154 +
155 +FS-LA (Falko Peters) programmed a pulse detection server that automatically detects peaks in the signal and integrates the samples around the peak.
156 +
157 +Things to set:
158 +
159 +* 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
160 +* 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
161 +* 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.
162 +
163 +\\
164 +
165 +
166 +
167 +\\
168 +
169 +[[image:attach:pulse_energy_server.jpg||height="400"]] [[image:attach:image2019-11-18_17-9-7.png||height="400"]]
170 +
171 +\\
172 +
173 + jddd  server panel  Definition of the parameters
174 +
175 +\\
176 +
177 +\\
178 +
179 +\\
180 +
181 +== Detailed expert stuff ==
182 +
183 +* [[ a collection of usefull things related to the OPIS ADCs>>doc:FLASH.OPIS ADC related things]]
184 +* a list of [[doc:FLASH.our MTCA ADC cards]] (only internal link)
185 +
186 +\\
187 +
188 +\\
189 +
190 +\\
191 +
192 +\\
193 +
194 +\\