1. Sector 29 PS Systems Stability Tests for LCLS
Antonio de Lira
Power Conversion Department
May 15, 2005

2. Sector 29 PS Systems Stability Tests for LCLS
Purposes:
Test a QE PS System over Sector 29
Check PS Stability vs. time and temperature
Measure Boost PS stability at currents as low as 0.5 A & 1.5A
Measure Buck PS stability at currents as low as 10A

3. Sector 29 PS Systems Stability Tests for LCLS
Boost PS under test
Data acquisition system:
Precision Zero-Flux Current Transducer (DCCT)
61/2 precision multi-channel DVM
Boost PS units
30V/20A

4. Sector 29 PS Systems Stability Tests for LCLS
Bulk PS under test
Data acquisition system:
Precision Zero-Flux Current Transducer (DCCT)
61/2 precision multi-channel DVM

5. Sector 29 PS Systems Stability Tests for LCLS
Booster Quad 901 PS stability results
Mean: 591 mA
Minimum: 584 mA
Maximum: 596 mA
Variation: 2.0 %
∆ Temp. : 7.5 °C
Note: Measurements taken on May 11, 2005

6. Sector 29 PS Systems Stability Tests for LCLS
Booster Quad 901 PS stability results
Mean: A
Minimum: A
Maximum: A
Variation: 0.67%
∆ Temp. : 8.6 °C
Note: Measurements taken on May 11, 2005

7. Sector 29 PS Systems Stability Tests for LCLS
Next steps:
Measure Boost PS Stabilities at 10A,15A, & 20A
Measure the stability of the reference to the Boost PS
Measure the current monitor output signal out of the Boost PS
Measure the Bulk PS Stabilities at low currents: 10A & 20A