---

Created by Main.MirkoPojer on 2007-05-23 - 19:02

Powering Tests of Sector 7-8: activity of Wednesday 23/05.

Today the activity was concentrated on Q5, which was released by MPP after analysis of the quench of Monday morning.

The following tests have been executed on Q5 (MANUAL execution):

• ramp to nominal (4310 A) with 5 A/s ramp rate: quenched occurred at 4210 A on B2 aperture; preliminary analysis confirmed it was a training quench;
• ramp to nominal (4310 A) with 5 A/s ramp rate: NO quench; a plateau of 10 min was mantained for possible voltage drift recording;
• keeping B1 power converter at nominal current, B2 power converter was lowered to 55% of the nominal current (2370 A); with this unbalanced configuration, a quench was driven by QPS generating an artificial quench signal from one current lead detector; test was successful;
• ramp to nominal (4310 A) with 5 A/s ramp rate: NO quench; a FPA was provoked from power converter, with an apparently too high ramp rate which triggered the quench detector.

Proposal for the activity of tomorrow.

Q4 and D2 will be tested from CCC.

Works towards powering the main circuits in the arc and the 600 A correctors (before reaching 1.9 K):

• plastic bags on 600 A leads (action S. Kockorowski);
• IST of QPS for which 1.9 K is not required (action R. Denz);

Once 1.9 K are reached:

• ElQA for the three 13 kA circuits and some selected 600 A correctors (list to be provided by HCC; action D. Bozzini);
• IST of QPS at 1.9 K (action R. Denz);
• OK from PIC, PC, EE and Current Leads.

Edit, attach file or add comment

---

Created by Main.BorisBellesia on 2007-05-23 - 12:26

Short Circuit Tests in UA27 - 23rd May

RAT_20070523.pdf:
https://twiki.cern.ch/twiki/pub/HCC/BlogEntryPoint2x2007x05x23x12x21/RAT_20070523.pdf

SOC_UA27_8hrheatrun.xls:
https://twiki.cern.ch/twiki/pub/HCC/BlogEntryPoint2x2007x05x23x12x21/SOC_UA27_8hrheatrun.xls

• The Set Of Circuits for the 8hr heat run attached. It includes all the circuits ion UA27 but the 13kA and the ones belonging to the powering subsector XR2

EE - IST
13kA EE	DONE	16-04-07
600A EE	DONE	23-04-07
Circuits >2kA
Powering tests PC 4-8kA	-	11-05-07
8h run 4-8kA	ON GOING	29-05-07
Interlock tests RQD&F	ONGOING	02-05-07
Powering tests RQD&F	-	24-05-07
Preparation RB.A23	ON GOING	19-04-07
Interlock tests RB.A23	-	29-05-07
Powering tests RB.A23	-	30-05-07
8h run >= 8kA	-	04-06-07
Circuits < 2kA
120A powering tests	DONE	03-05-07
600ANOEE powering tests	ON GOING	08-05-07
600A-EE interlock tests	ON GOING	03-05-07
600A-EE powering tests	DONE	18-05-07
8 hr run PC < 2kA	-	29-05-07
24hr heat run test	-	07-06-07
Polarity Check < 8KA	-	30-05-07
AUG- UPS test	-	08-06-07

Edit, attach file or add comment

---

Created by Main.AntonioVergara on 2007-05-23 - 12:01

Powering Tests Sector 78 - Minutes 23/05/2007

RAT_20070524.pdf:
https://twiki.cern.ch/twiki/pub/HCC/BlogEntryPoint8x2007x05x23x11x59/RAT_20070524.pdf

Comments:

Edit, attach file or add comment