CDF Silicon Workshop th May 2006 New BLM & BLM electronics Jose E. Garcia, Jennifer Gimmell, Ulrich Husemann

Outline J.E.Garcia – CDF Silicon Workshop – Santa Barbara 2 New BLM System New BLM System Motivation Motivation (why do we need an upgrade) Characteristics Characteristics (electronics, …) Current Status Current Status Installation plans Installation plans Commissioning Plans Commissioning Plans (software, firmware, ACNET interface) Summary Summary

Motivation J.E.Garcia – CDF Silicon Workshop – Santa Barbara 3 Tevatron project to improve ABORT system Prevent against this Long reaction time

Motivation J.E.Garcia – CDF Silicon Workshop – Santa Barbara 4 ► CDF BLM Upgrade Add more information to the old system which is working reliably Use same well-understood type of detectors with enhanced capabilities (new electronics) Maybe an intermediate step towards a diamond-based beam abort system ► Goals: install new BLMs and all cables Shutdown: install new BLMs and all cables commissioning After shutdown:commissioning

System Overview J.E.Garcia – CDF Silicon Workshop – Santa Barbara 5 Integrate BLM current and digitize at Tevatron turn frequency (every 21  s) Integrate BLM current and digitize at Tevatron turn frequency (every 21  s) Form three running sums for additional integration periods Form three running sums for additional integration periods  Programmable time constants One abort threshold per integration period of each channel One abort threshold per integration period of each channel Possibility to change abort thresholds and masks in response to machine status Possibility to change abort thresholds and masks in response to machine status  Read-out using VME system and Ethernet  VME CPU can be used for system computations

System Characteristics J.E.Garcia – CDF Silicon Workshop – Santa Barbara 6 High Voltage Power Supply BLM VME / ACNET Controller Card Interface to VME crate Timing Card Synchronous integration clock digitizers Abort Card FPGA info from digitizers compared with abort masks and produce abort signals Digitizer Card 4 Channels with integrator and ADC FPGA Compares readings and sums to programmed thresholds - i.e. 1ms, 10ms, 1s BLM Electronics BLM

Current Status J.E.Garcia – CDF Silicon Workshop – Santa Barbara 7 Picked up 5 new BLMs from Marv Olson of AD Instrumentation Department (4 to be installed, 1 spare) BLMs are tested by AD, gain: 10  C/Gy Old fixtures removed from collision hall New fixtures finished in April 2006: add-on to old fixtures Cables ready for the installation BLM BLMs

Installation Plans J.E.Garcia – CDF Silicon Workshop – Santa Barbara 8 Sharing crate with diamonds (first-floor counting room 1RR04D) Richard Tesarek Shutdown project New Modules already requested Installation of new BLM System Installation of new BLM System  BLMs and cables set-up

Commissioning Plans J.E.Garcia – CDF Silicon Workshop – Santa Barbara 9 Initial phase of testing correct read-out – immediately after installation Check that the dose rate and integrated dose agree for old and new system. Set up the abort logic of the new system such that the limit is reached during a regular store. Check if the radiation levels for an abort agree – immediately after accelerator start-up Run the system with same limits and for an abort. Check if both systems have fired and compare their FIFO contents. Keep new BLM as back-up system up to reliability is completely proved – depending on how much chances do we have to test it

Before Commissioning J.E.Garcia – CDF Silicon Workshop – Santa Barbara 10 ACNET Controls for BLMs Adapt actual settings in ACNET (E2 page) for new BLMs (next week) Use similar set-up: Global reset Current rate and integrated dose FIFO controls Paul Derwent will help us in the integration Use New Java Front-End Establish a integration of radiation (1 minute, full store) out of the built-in rolling sums Some infrastructure is needed : Development of mechanisms for abort acknowledgment - equivalent to current Kludge card.

Summary J.E.Garcia – CDF Silicon Workshop – Santa Barbara 11 We will have our slot in the following weeks We will have our slot in the following weeks  Material and BLMs are ready for installation Commissioning Commissioning  Read-out system: VME modules and ACNET controls will be set-up during next week  Prepare system for radiation level tests at the beam startup  New system working as backup for a test period Unfortunately, I was not able to join you there. Finally after some troubles I have my visa. Enjoy the weekend!!!

CDF Silicon Workshop th May 2006 Additional Slides