Wiki source code of ADCs for User experiments

Last modified by sndueste on 2025/04/23 17:33

version	line-number	content
7.1	1	Content:
2.1	2
6.1	3
7.1	4
14.1	5	{{toc minLevel="2"/}}
6.1	6
8.1	7	----
	8
6.1	9	= Our ADC cards =
2.1	10
6.1	11	== GHz ADCs: SP-Devices ADQ412AC ==
2.1	12
28.1	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]])
9.1	15	The cards are connected via Patch panels to the Experimental endstations and can be operated with a jddd panel:
2.1	16
9.1	17	[[image:attach:image2019-10-21_15-21-23.png\|\|width="800"]]
	18
2.1	19
9.1	20
4.1	21	* NOTE: between ADC and Patch panel we have installed an [[EMP protector>>attach:EMP_protector.pdf]] and an additional 1dB attenuator
29.1	22	* for the influence of the Patch cable and the EMP protector see also [[this logbook entry>>url:http://ttfinfo.desy.de/ExpHallelog/show.jsp?dir=/2016/27/08.07&pos=2016-07-08T17:41:07\|\|shape="rect"]]
2.1	23
3.1	24	(% class="wrapped" %)
2.1	25	\|(((
	26	Impedance AC
	27	)))\|(((
	28	50 OHM
	29	)))
	30	\|(((
	31	Input voltage range
	32	)))\|=(((
26.1	33	the complete range is about 1V for 4096 counts.
25.1	34
	35	Thus +- 0.5 V for baseline at 0V
	36
	37	BUT the baseline can also be shifted ...
2.1	38	)))
	39	\|(((
	40	Digitizer resolution
	41	)))\|(((
	42	12 bit
	43	)))
	44
	45	4 CHANNELS MODE
	46
3.1	47	(% class="wrapped" %)
2.1	48	\|(((
	49	Sampling rate
	50	)))\|(((
10.1	51	2 *
2.1	52	)))\|(((
	53	GSPS
	54	)))
	55	\|(((
	56	Analog bandwidth
	57	)))\|(((
	58	2
	59	)))\|(((
	60	GHz
	61	)))
	62
	63	2 CHANNELS MODE
	64
3.1	65	(% class="wrapped" %)
2.1	66	\|(((
	67	Sampling rate
	68	)))\|(((
10.1	69	4 *
2.1	70	)))\|(((
	71	GSPS
	72	)))
	73	\|(((
	74	Analog bandwidth
	75	)))\|(((
	76	1.3
	77	)))\|(((
	78	GHz
	79	)))
	80
10.1	81	~* 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.
	82
2.1	83
	84	===== ADC and DOOCS / DAQ =====
	85
	86	The HDF5 names for the ADC traces are depending on the beamline :
28.1	87	\\PG Beamline:
	88	{{code language="none"}}/FL1/Experiment/PG/ADQ412 GHz ADC/CH00/TD{{/code}}
	89	{{code language="none"}}/FL1/Experiment/PG/ADQ412 GHz ADC/CH01/TD{{/code}}
	90	{{code language="none"}}/FL1/Experiment/PG/ADQ412 GHz ADC/CH02/TD{{/code}}
2.1	91	{{code language="none"}}/FL1/Experiment/PG/ADQ412 GHz ADC/CH03/TD{{/code}}
	92
28.1	93	BL Beamlines:
	94	{{code language="none"}}/FL1/Experiment/BL1/ADQ412 GHz ADC/CH00/TD{{/code}}
	95	{{code language="none"}}/FL1/Experiment/BL1/ADQ412 GHz ADC/CH01/TD{{/code}}
	96	{{code language="none"}}/FL1/Experiment/BL1/ADQ412 GHz ADC/CH02/TD{{/code}}
	97	{{code language="none"}}/FL1/Experiment/BL1/ADQ412 GHz ADC/CH03/TD{{/code}}
	98	\\{{code language="none"}}/FL1/Experiment/BL2/ADQ412 GHz ADC/CH00/TD{{/code}}
	99	{{code language="none"}}/FL1/Experiment/BL2/ADQ412 GHz ADC/CH01/TD{{/code}}
	100	\\{{code language="none"}}/FL1/Experiment/BL3/ADQ412 GHz ADC/CH02/TD{{/code}}
2.1	101	{{code language="none"}}/FL1/Experiment/BL3/ADQ412 GHz ADC/CH03/TD{{/code}}
	102
15.1	103	and at FLASH2
	104
	105
	106
	107
28.1	108
29.1	109
32.1	110	{{code language="none"}}
	111	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
	112	{{/code}}
30.1	113
31.1	114
28.1	115	DOOCS prop : {{code language="none"}}FLASH.FEL/ADC.ADQ.PG/EXP1.CH00/CH00.TD or CH00.DAQ.TD{{/code}}
16.1	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 ...
2.1	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
6.1	125	== Amplifiers for the GHZ ADCs ==
2.1	126
6.1	127	* 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.
	128	* The available ADCs 5x, 10x, 20 x 50x and 100x
	129	* The ADCs can be borrowed from Markus Braune
16.1	130	* 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]]
32.1	131	* There are also [[BiasTs>>attach:ZX85-12G-S+.pdf]] available that can be borrowed ([[link to internal page>>doc:FLASH.Controls, Data recording & Analysis.IT Docu (expert stuff).Hardware (Computers, MTCA & motorcontrol).Bias T.WebHome]])[[image:1720425048368-937.png]]
6.1	132
	133	== 108 MHz ADCs: Struck SIS8300-L2D ==
	134
2.1	135	There is one in each of the MTCAs in the hall: MTCA-EXP1 at PG/BL1, the other at BL2 and BL3.
	136
33.1	137	They are 16 bit, 10 channel, 125 MS/s , 50 Ohm. ADCs. Here is a link to the [[Struck website>>url:https://www.struck.de/sis8900.html\|\|shape="rect"]]
2.1	138
	139
	140	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).
	141
	142	Here is a trace of the first signal, a 1 MHz trigger connected from the x2timer board in the same MTCA:
	143
17.1	144	[[image:attach:adc_mhz.jpg\|\|height="400"]]
2.1	145
	146
6.1	147	== Pulse energy server: Using the Struck SIS8300-L2D to detect only integrated values of pulses ==
2.1	148
12.1	149	FS-LA (Falko Peters) programmed a pulse detection server that automatically detects peaks in the signal and integrates the samples around the peak.
2.1	150
12.1	151	Things to set:
	152
	153	* 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
2.1	154	* 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
	155	* 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.
	156
20.1	157	[[image:attach:pulse_energy_server.jpg\|\|height="400"]] [[image:attach:image2019-11-18_17-9-7.png\|\|height="400"]]
	158
11.1	159
12.1	160	jddd server panel Definition of the parameters
	161
11.1	162
	163
12.1	164
21.1	165	== Detailed expert stuff ==
13.1	166
30.1	167	* [[ a collection of usefull things related to the OPIS ADCs>>doc:FLASH.Photon Diagnostics.OPIS.OPIS ADC related things.WebHome]]
	168	* a list of [[our MTCA ADC cards>>doc:FLASH.Controls, Data recording & Analysis.IT Docu (expert stuff).Hardware (Computers, MTCA & motorcontrol).our MTCA ADC cards.WebHome]] (only internal link)
27.1	169	* 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 ..