1. The spoke CM tests at FREIA
What we have, what we plan, what we don’t know…
Konrad Gajewski
FREIA Laboratory

2. FREIA Laboratory - infrastructure
LHe cryo-plant
The bunker
Two 352 MHz 400 kW RF amplifiers
RF switchboard, transfer lines, circulators, loads, etc.
Horizontal cryostat (HNOSS)
Deionized cooling water system
Radiation monitoring system
Oxygen deficiency detectors
RF leakage detectors
Weather station (temperature, humidity, pressure in the hall)
26-Oct-2017
Konrad Gajewski – The spoke CM FREIA

3. FREIA Laboratory – control system
EPICS (ICS Development Environment)
All subsystems connected to EPICS
PLC for slow control (water, vacuum, interlocks, radiation protection)
µTCA LLRF and timing (LU)
cRIO for fast interlocks (programmed in LabVIEW)
Almost all data archived using archive appliance (and CS-Studio archiver as backup)
CS-Studio BEAST alarm server
CS-Studio BOY as a primary user interface
LabVIEW
Most of the laboratory instruments (oscilloscopes, signal generators, spectrum analyzers, power meters, vector network analyzer)
NI PXIe fast data acquisition (10 channels, 250 Ms/s, input bandwidth 800 Mhz, Self Exited Loop)
26-Oct-2017
Konrad Gajewski – The spoke CM FREIA

4. Tests done so far – gained experience
Copper cavity
SEL
RF calibration procedures
instrumentation
Single spoke cavity
Cryogenics (cooling down, heat loads)
gradient measurements
Double spoke cavity
power coupler and cavity conditioning (automatic procedure)
high power tests: filling time, Lorentz force detuning
Cold Tuner System
26-Oct-2017
Konrad Gajewski – The spoke CM FREIA

5. CM tests -warm RF check: cavity spectrum, external Q
CTS verification: piezo and step motor
Calibration of the RF lines
Interlock tests
Coupler conditioning
26-Oct-2017
Konrad Gajewski – The spoke CM FREIA

6. CM tests - cold Recalibration of the RF lines
Cavity spectra (fundamental and HOM)
Coupler and cavity conditioning
Tests of the cold tuners (stepper motor, piezo)
Q measurements (QL, Q0,
Temperature effects on cavity tune
Measurement of the cavity gradient
X-ray emmission
Electron activity in the coupler
Dynamic RF losses
Lorentz force detuning (measurement and compensation)
Microphonics
26-Oct-2017
Konrad Gajewski – The spoke CM FREIA

7. Compatiblity FREIA - ESS
Common equipment for the tests:
Instrumentation
Power meters
Scope, spectrum analyzer …
RF measurements
µTCA LLRF we use it for the fast interlocks)
NI PXIe
Interlocks
Arc detectors
Multipacting detectors (threshold/ADC)
Vacuum levels (threshold/ADC)
Radiation monitors
Quench detector
26-Oct-2017
Konrad Gajewski – The spoke CM FREIA

8. Problems to deal with Contact persons Valve box controls
New timing system
CTS controls (piezo controller and software)
PLC interface (S7-300 using standard s7plc driver from PSI)
Laboratory instrumentation - EPICS support
Missing:
LLRF: broken CPU, signal generators, timing system, piezo controller
Naming conventions, standard OPI (symbol library, color styles, etc)
Test acceptance criteria
Automatization of the test procedures (python, LabVIEW, Jupiter Notebook)
Sharing the tests configuration, procedures and results (tools, standards) …
26-Oct-2017
Konrad Gajewski – The spoke CM FREIA