Machine Signals

The following shall give an overview of the electronic interfaces at the machine to specific signals, e.g. for data acquisition.

Timing system

All Events can be programmed through ParamModi. This has several advantages: settings are logged in archiving and can be reconstructed afterwards, when programming through ParamModi the user can remain agnostic of BPID-#, SID-# and other pattern-specific numbers that change from experiment to experiment.

Generally, the low-level timing settings in Genesys should never be touched by users. If you think otherwise, please let us know!

Please select the Target Exp tab in ParamModi for your pattern and enable all start and stop events, that you need. Only if they are enabled, they will also be played by the WhiteRabbit system. There are events foreseen for

• Injection Pulse
• Target on/off (gasjet, electron target, ... depends on experiment)
• Experiment DAQ on/off (flag for your DAQ when the Machine is in a process with measurement conditions)
• Experiment Drive in/out (Moving e.g. particle detectors, scrapers, ... in/out)
• Electron cooler beam is on/off
• Extraction Pulse

sddsc204

The timing receiver Sddsc204 (replaces Scuxl0319) is located in the electronics hutch of CRYRING (TH2.033). It is equipped with two five-channel timing receiver cards (tr0 and tr1) and can be programmed through Genesys. Outputs are Low-Voltage TTL (+3.3V) and are accessible on a nearby patch panel. The tentative channel assignment is given below.

Channel	type	Function
tr0:1	Pulse (1μs)	Ring injection (#283)
tr0:2	Gate	Enable Experiment DAQ (#528 -> #529)
tr0:3	Gate	Enable Detector (#530 -> #531)
tr0:4	Gate	Enable Target (#526 -> #527)
tr0:5	Gate	Enable E-beam (#522 -> #523)
tr1:1	Pulse (1μs)	Ring extraction kicker start (#1027)
tr1:2		TBA
tr1:3		TBA
tr1:4		TBA
tr1:5		TBA

scuxl0006

A second timing receiver is scuxl0006 and is located inside the HV cage of the ElectronCooler and also running the Genesys class. There are only two channels available, the B1/B2 channels on the SCU card. Their assignment is as follows:

Channel	Level	Function
B1	TTL	Genesys: Hi-Level from CMD_EXP_DAQ_START CMD_EXP_DAQ_STOP
B2	TTL	Genesys: TBA

See also Timing System Event Numbers in the Wiki of the Timing group.

Programming timing receivers

Please first make sure that the events are actually being played by WhiteRabbit: Open ParamModi and see if they are enabled in the "Target Exp" tab. If they are enabled, please use Genesys for programming the Receivers (see also Genesys UserManual.pdf and Timing Wiki: Timing System Event Numbers)

Beam diagnostics

A patch panel at the top of rack EX3 in the electronics hutch (TH2.033) is interfacing with signals from the BeamDiagnostics electronics room (connectors: BNC-50Ω) The assignment of the channels is semi-permanent and as follows:

Channel	Signal Direction	Signal type	Description
1	Exp	NIM	Lassie ch: YR00DA1ZA (Particle detector count rate from experiment)
2	Exp	NIM	Lassie ch: YR00DA1ZB
3	Exp	NIM	Lassie ch: YR00DA1ZC (Cooler collector current)
4	Exp	NIM	Lassie ch: YR00DA1ZD (Cooler platform voltage)
5			reserved
6			reserved
7			reserved
8			reserved
9	Exp	NIM	horizontal IonizationProfileMonitor MCP count rate (IPM)
10	Exp	NIM	vertical IPM count rate
11	Exp	NIM	ParametricCurrentTransformer
12	Exp	NIM	IntegratingCurrentTransformer integral
13	Exp	NIM	BeamPositionMonitor integral
14	Exp	NIM	Schottky "Span-0"
15	Exp	NIM	CryRadio
16	Exp	NIM	RingRF

Please note that NIM signals use a current-based logic with negative pulse for "true" (at −16 mA into 50 ohms = −0.8 volts) and 0 mA for "false" (see also Nuclear Instrumentation Module.)

Detailed information on the beam diagnostics system can be found in the documents folder of CRYRING Sharepoint at Technical Documents and Literature/Diagnostics/ReferenceDocuments.

Experiment Signals

• PatchPanelBlack
• PatchPanelWhite

ElectronCooler

• Current: EcoolCurrentMeasurement
• Energy: ArnoldHV voltage divider, G35VoltageDivider, FC20VoltageDivider