# Presentation: 238180

## Power Supply Solutions in Hostile Area

**Power Supply Solutions ****in ****Hostile Area**

**Nicola PAOLI **
**Jacopo GIVOLETTI**
**E-mail: < n.paoli@caen.it >**
**E-mail: <j.givoletti@caen.it>**

**UNI EN ISO 9001 CERT.N.9105.CAEN**

**COSTRUZIONI     APPARECCHIATURE     ELETTRONICHE     NUCLEARI**
- Via Vetraia, 11 -  I 55049  VIAREGGIO (Italy)                      URL: http://www.caen.it

## Summary

- What does it mean “HOSTILE”?
- Why in Hostile?
- CAEN experience
- CAEN Custom Solutions

## What does it mean “HOSTILE”?

- Hostile Area: presence of a strong magnetic field and proton and/or neutron radiation.
- Limits:
- Radiation: up to 1012 neutrons/cm2 of total dose
- Magnetic Field: up to 10 kGauss

## SY1527 System Integration

**TCP/IP LAN**

**OPC LAN**

- Telnet Client

- LabView on
- PC/MAC

**Internet**

- Router

**WAN Link**

- Telnet Client

**ETH I/F**

- OPC
- Server
- (via RS232)

**RS232 I/F**

**Custom**
**HV Distr.**

**Detector**

- OPC
- Server
- (via TCP/IP)

- OPC Client

**Custom**
**LV Distr.**

**Custom**
**Device**

**Hostile** **Area**

**Notes:**
0 messaggio: le comunicazioni sono standard
1mo: possiamo pilotare sistemi “Alieni”© tipo crate Wiener o integrare sistemi proposti da altri gruppi della CMS collaboration
2do: Caen ha sviluppato conoscenza per elettronica in Control R. per 20 anni ma ora , viste le richieste, sta sviluppando anche elettroniche per l’H.A.. Per cui esistono gruppi come: 
Camere a Muoni per cui proponiamo elettronica completamente in HA sia LV che HV
E-CAL dove proponiamo l’HV in Control R. e la bassa in HA e di cui dobbiamo discutere più in dettagli le specifiche
Inner Tracker dove abbiamo una proposta doppia: sia HV e LV in Control R. sia completamente in HA
.... Altro
Questo però ci fa vedere che l’unico modo per equipaggiare PS per CMS è quello della stretta collaborazione. Perché solo collaborando in maniera stretta si può individuare il miglior modo di lavorare

## CAEN Approach to the Problem

- Radiation & Magnetic Field Tolerance
- COTS (Low Cost)
- Hi-Power (up to 1 kWatt)
- Efficient Energy Transmission
- Low Noise
- Floating Ground

**Notes:**
COTS: Components of the shelf

## CAEN Experience in “H.A.”

- ’97: First COTS rad-tolerance tests (ENEA - La Casaccia)
- ’98: NIC Non Inductive Converter
- ’99: Tests with protons and neutrons in Louvain-la-Neuve of A877 (CMS Muon Chambers )
- ’00: Special material research
- ’01: A New design (Patent Pending) for a family of High and Low voltage DC/DC converters

## First Solution for CMS μ Drift Tubes

**First Solution for CMS ****μ**** Drift Tubes**

- Hostile Area

- Control Room

## CMS DT Master Slave Boards

- 4 HV primary ch
- Low Voltages for remote boards
- Communication

- 12 complex ch. + comm. link
- V and I monitor on each output
- p and n irradiation tests

- Master Board

- Slave Board

## Slave Board Irradiation Tests 

- First tests in ‘99 with neutron beam up to 60 MeV, 2*1011 neutrons/cm2
-  Components Failure
- Tests in ‘00-’01 with protons beam of 60 MeV & up to 7 kRad, 2*1010 protons/cm2
-  Successfully  Passed!

## Derived Solutions

- HV board for the Endcap Muon Chamber based on the same philosophy
- HV and LV board for the RPC
- DC/DC in Hostile Area!!!!

**Notes:**
Good Approach valid for the HV but more complicated for the LV

## The New DC/DC Philosophy

**Notes:**
4to messaggio: La 48 volt è tutta da definire e lanciamo l’interesse per una collaborazione nello sviluppo

## CAEN Standard Prototyping Flux

**Notes:**
Messaggi: 
M0: collaborazione tra Caen e gruppi sperimentali per convergere su una soluzione finale al piu’ presto
M1: presa di coscienza dei tempi di sviluppo

## Functional Prototype

- SASY: a Sub Assembly SYstem
- Easy testing in hostile area
- HV & LV Floating ground channels
- SY1527/SY2527 standard control

## The SASY 2000

- A “functional prototype” solution

## SASY 2000 Design

- SASY 2000 Power Supply and Control:Actual Implementation

##  Common Noise Reduction Viewpoint

## SASY 2000 family: Custom Development

##  SA2002: 2 Ch LV Module

_**Main Features**_
_**for each channel:**_
- V out = 	4.5 ÷ 5.5 V
- 		6.5 ÷ 7.5 V
- I  out = 	2 A	1 A
- Ripple = < 20 mVpp

## SA2003: 4 ch DAC Module

_**Main Features**_
_**for each channel**__**:**_
- 14 bit progammable voltage = 0 ÷ 3 V
- I  out = 30 mA

## SA200x1 ch LV High Current Module

_**Main Features:**_
- V out = 5 V
- I  out = 80 A
- Ripple = < 30 mVpp

**Patent Pending**

## Test Setup

## Test Setup

## SA2004: Tests performed

- Channel efficiency checked in the following condition:
- Vin	= 45.5 Volt, 48 Volt, 50.5 Volt
- Vout	= 5 Volt
- Iout 	= 30, 40, 50 Amp
- B	= 0, 1, 3, 5 kGauss

## SA2004: Test results

- Worst Case:

## SA200x Tests performed

- Channel efficiency checked in the following condition:
- Vout	= 5 Volt
- Iout 	= 40, 60, 80 Amp
- B // and  	= 0, 1, 2, 3, 4, 5 kGauss

## SA200x Test results - 1

- Worst Case:

## SA200x Test results - 2

- Best Case:

## Radiation Test Louvain la Neuve, August 26th 2002

- Modules tested: SA2002, SA2003 and SA2004
- Radiation: up to 60 MeV, Fluence 108 neutrons/cm2Sec
- Average target distance: 75 cm.
- Total Dose: 1012 neutrons/cm2
- Time of test: 10000 Sec = 2h 40’
- Branch controller on SY2527

## Test Setup

- Louvain la Neuve, August 26th 2002

## Test Setup

- Louvain la Neuve, August 26th 2002

## Tests Performed

- During the test lots of cycles of ramp-up and ramp-down were performed
- Output voltages
-    were changed
-    continuously

## Test Results

- During the test the communication with the SASY was lost for three times, but it was recovered with a remote operation.
- After the test and the total dose of 1012 neutrons/cm2 the SASY works perfectly.

## Conclusions

- After years of research CAEN is now ready to design and produce Power Supply Solutions able to work under a strong magnetic field and neutron and/or proton radiation.

**Notes:**
Messaggio: Mettere in evidenza l’importanza di una collaborazione formalmente ufficializzata: CAEN partner ufficiale di CMS

## Power Supply Solutions in Hostile Area

**Power Supply Solutions ****in ****Hostile Area**

**Nicola PAOLI **
**Jacopo GIVOLETTI**
**E-mail: < n.paoli@caen.it >**
**E-mail: <j.givoletti@caen.it>**

**UNI EN ISO 9001 CERT.N.9105.CAEN**

**COSTRUZIONI     APPARECCHIATURE     ELETTRONICHE     NUCLEARI**
- Via Vetraia, 11 -  I 55049  VIAREGGIO (Italy)                      URL: http://www.caen.it