1. SPS BPM system renovation
Roadmap & Milestones

2. Synopsis Introduction and Overview: Andrea Infrastructures Electronics
Fibres: Simao
Cables: Joel
Electronics
Analogue Front-End: Manfred
Digital Front-End: Manoel
Back-End: Andrea
GW: Andrea & Manoel
SW: Athanasios
Integration and commissioning: Andrea

3. Introduction MOPOS (Multi Orbit POsition System)
228 BPMs in 216 locations (12 double planes)
System obsolescent
Cables’ continuous degradation requires recalibration and replacements
Too many gain stages
Need to set the gain before the injection
ALPS (A Logarithmic Position System)
Based on BI new standard boards
Digitalization in the tunnel (rad-tolerant design needed)
Use of Logarithmic amplifiers to compress the dynamic range
3 sensitivity ranges, but acquired in parallel

4. Overview: ALPS The original plan Extensive tests in 2017
Commissioning in parallel to MOPOS in 2018

5. Overview: ALPS What happened in 2016
The last prototype tested in November 2016
Met the resolution requirements
Could not cover the full dynamic range
The radiation working group reviewed the radiation distribution and levels

6. Fibres: Simao

7. Cables: Joel

8. Arcs & LSS: Short coaxial cables
RG 58 coaxial cables cables (1.2m to 10m)
Delivery in progress (today ~ CERN, 100% for the end of the year). Due to quality problems in the past (assembly of the connector, manufacturer side) we proceed to a reflectometry test for a lot of them.
installation at the same time with front end electronic.

9. Straight sections: Long coaxial cables
CMC 50 coaxial cables.(20m up to 160m)
Remains to be installed : TS2 Left (-). 12 cables. Expected during LS2.
Reflectometry test by BI/QP to be done during YETS

10. Analogue FE: Manfred

11. ALPS RF Frond-end Layout (1 Ch.)
BPM
Not shown:
Output stages
Anti-aliasing LPF
Details of the CAL system
Absorptive LPF
X-bar switch
2x per plane
Log Amps
To ADC channels
6 dB coupler
Hairpin BPF
6 dB coupler
20 dB coupler
diode limiter
high sensitivity range: -45…-5dBm
3…50 m coaxial cable IN
ext. RF PCB
DOROS
OUT
20 dB coupler
medium sensitivity range: -25…15dBm
CAL signal
CTRL
PWR
low sensitivity range: -5…35dBm
Main RF Front-end PCB
Logic I/O
Log Σ-signal

12. Required Hardware – Status Nov. 2017
500x absorptive 400 MHz low-pass filter & impedance matching section
Directly connected (no cables!) to the BPM pickup electrodes
Reuse of already manufactured housings
Need minor modifications
PCB layout finalized, ready for prototype manufacturing
All filters need to be characterized (S-parameter measurement) and matched in pairs
Version with 3 dB power splitter for sextant test
MOPOS and ALPS can run in parallel
250x X-bar relay switch
For calibration purposes
500x 200 MHz hairpin band-pass filter
PCB layout for 10 MHz BW prototype filter is finalized
Quote for prototype manufacturing (10 units) at hand
Rogers substrate and prepreg are ordered, expected delivery end of November
250x main RF front-end PCB
Design is finalized
Schematics for prototype manufacturing ready for final review
Majority of electronics components in house
Need radiation tests for a few new RF components, all GaAs HEMT technology, no surprises expected

13. Milestones 2018 A-FE design frozen
Prep cables in SPS for sext. test
rad. tolerance verification of new RF components (in CHARM)
2017
September
December
2018
November
2019
February
March
June
May
A-FE prototypes (10)
Installation of 2
A-FE and D-FE in BA4
End of validation with
beam of the A-FE
Installation of 36 systems (1 sextant) – need 1 day min.
A-FE Layout review
and approval
Start of production
A-FE V2 (40)
End of qualification with beam
A-FE design frozen
Procurement of missing electronics components
Development of a verification and calibration test system

14. Milestones LS2 Calibration test stand fully operational
2019
2020
2021
February
January
March
June
Production start
Pre-production batch
End of production
End of modules tests
Calibration test stand fully operational
Characterization of all 200 MHz BPFs
Pair matching of the filters

15. Remarks
The R&D of the RF front-end electronics experienced some major delays!
Lab and beam test showed that the prototype electronics could not fulfill all requirements
Lead engineer retired, switch of manpower in Spring 2017
The 200 MHz band-pass filter is mission critical!
Filters with 5 and 7.5 MHz bandwidth will be developed as alternative to the 10 MHz baseline design
Pro: This will improve the single bunch response (longer ringing)
Con: This will reduce the signal level sensitivity (less energy)
In-house manufacturing coordination
The main RF PCB manufacturing will be coordinated by Betty and her team
RF and exotic electronics components will be provided by BI-QP
Most (but not all) components are already in-house for full quantity production
Check out of the hardware
Filters will be characterized with a VNA
Followed by pair matching
Main RF PCB requires a fully automatized calibration test stand
Control and DAQ using the digital front-end
Signal generation with RF/pulse-generator and precision step attenuators (in procurement)

16. Digital FE: Manoel

17. Digital FE Bpm Digital Front-end (BDF)
ALPS specific rad-hard ADC-based board
Digitizes the analogue signals from the ALPS Analogue Front-End
Status:
Already in production stage: 228 operational, 42 spares
Components for 200 more in stock
Gbt-based Expandable Front-End (GEFE)
Standard rad-tolerant digital Front-End card for BI projects
Interfaces the ALPS Front-End electronics with the Back-End
Status:
40 pieces already produced for a sextant…
Production foreseen for 228 operational, 42 spares
Components in stock for 80 more boards
… but redesigned due to changes in the expected radiation levels

18. Digital FE: the Split GEFE (S-GEFE)
The Split GEFE (S-GEFE) is an evolution of the GEFE board:
Provides the same functionality but split in two boards:
Link GEFE (L-GEFE): Mezzanine card featuring exotic components from CERN EP
Carrier GEFE (C-GEFE): Carrier card featuring COTS components
The L-GEFE and C-GEFE may be used independently:
The L-GEFE is rad-hard by design up to TID levels of MGy
The C-GEFE is rad-tolerant up to TID levels of 750 Gy
Status:
S-GEFE
First two prototypes already ordered +

19. End 2017 – 2018: Digital FE roadmap to LS2
2019
November
February
October
March
April
July
Finish S-GEFE design
Launch S-GEFE production
Test S-GEFE prototypes
Receive BDF production
Finish BDF production test
Receive S-GEFE production
Finish S-GEFE production test

20. Back-End: Andrea

21. Status in October 2017 – VFC-HD
75 boards to produce for ALPS (1 process 4 BPMs)
57 operational – 18 spares
BI will produce 900 boards: contract to be awarded in December
Test performed during production at the assembly premises
4 boards already available for the project

22. End 2017 – 2018: VFC roadmap to LS2 2017 2018 2019 December December
January
May
Finalisation of the test bench
10+ more boards assigned to ALPS
Full production start
Reception of last production batch

23. GW: Manoel & Andrea

24. Status in October 2017 – FPGA code (GW)
GEFE (Front-End):
Up transmission: done
Calibration interface: to be defined
Porting from GEFE to L&C-GEFE: to be done (pin assignment)
VFC (Back-End):
Communication with the analogue FE: done
Memory map already defined
Orbit, Injection Trajectory, and Capture modules: done
FIFO module: to be done
Data storing in the large external memory (DDR3): to be done
Interlock process module: to be done (functionality to be rediscussed)

25. L&C GEFE Production test GW
End 2017 – 2018: GW roadmap to LS2
2017
2018
2019
December
February
January
March
May
L&C GEFE Production test GW
VFC Production test GW
DDR3 Interface
Porting to L&C GEFE
FIFO & Calibration
Time available for tuning to the beam conditions

26. SW: Athanasios

27. Status in October SW
FESA SW and Expert GUI for qualifying the analogue front-end

28. End 2017 – 2018: roadmap to LS2 - SW 2017 2018 2019 September December
February
January
March
May
Final Memory Map Encore Driver
C/C++ Wrapper simulation functionality
Stand-alone testers
Operational API agreement
FESA SW available
Expert GUI available

29. Integration and commissioning: Andrea

30. Integration, Installation, and Tests in 2018
Qualification of the
A-FE with beam
GW/SW algorithms’ tuning and
Integration tests
Sextant test
2017
2018
2019
September
December
February
March
May
July
Receive S-GEFE production
A-FE prototypes (10)
Expert GUI available
GW available
Receive BDF production
FESA SW available
40 more AFE available
10+ VFC assigned to ALPS
Received last VFC

31. Integration, Installation, and Tests in LS2
2019
2020
2021
September
February
February
April
End of Tunnel Installation
End of dry commissioning
End of commissioning with Beam
Installation of the Back-End
GW/SW integration test with simulated data
(depending on controls’ infrastructure availability)
End of A-FE tests

32. Integration, Installation, and Tests in LS2
Readiness assessment
and SPS recommissioning plans
2018
2019
2020
2021
September
February
February
April
End of Tunnel Installation
End of dry commissioning
End of commissioning with Beam
Installation of the Back-End
GW/SW integration test with simulated data
(depending on controls’ infrastructure availability)
End of A-FE tests

33. Integration, Installation, and Tests in LS2
Readiness assessment
and SPS recommissioning plans
Option to restart
with MOPOS
2018
2019
2020
2021
September
February
February
April
End of Tunnel Installation
End of dry commissioning
End of commissioning with Beam
Installation of the Back-End
GW/SW integration test with simulated data
(depending on controls’ infrastructure availability)
End of A-FE tests

34. Summary There are delays on the original schedule due to
Analogue front-end redesign required after the tests with beam of 2016
Digital front-end redesign required after changes in the expected radiation distribution and levels
Extensive simulation shows that the redesigned A-FE will meet the requirements
The integration test on a full sextant from September 2018 to LS2
There is the possibility to install ALPS in parallel to MOPOS
Faster SPS recommissioning
BUT CO should keep support for LynxOs!