MTA Monitoring Report 10/12/01 - 10/18/01

Archive of Monthly reports

Radiation

Quiet

CTI Trend

Average of ACIS-I CCDs (MnKa) slope 1.379e-8 CTI/day
Detrended slope 1.324e-8 CTI/day

ACIS Warm Pixels

	CCD2	CCD3	CCD4	CCD5	CCD6	CCD7	CCD8
New this week/ Reappeared
Previously reported - still observed	(483,816) (526,66)			(1-3,775-1024) (226,565) (232-245, 313) (509, spurious rows) (510-511,775-1024) (512,775) (513,776-1024) (607,281) (1022,166)	(360,249) (766,501)	(1-3,1-1024) (4,spurious rows) (509, spurious rows) (510-515,775-1024) (516,spurious rows) (1022,775)	(62,482) (587,544)
Previously reported - not observed during this period			(247,364)

ACIS Focal Temperature

Day (DOY)	Temp (C)	Width (Days)
285.71	-117.28	0.46
288.40	-118.09	0.35
290.99	-118.74	0.27

ACIS Corner Pixels Trends

For each observation, the average corner pixel centroid on CCDs 2,3,6, and 7 is determined. That is, the centroid of a gaussian fit to the histogram of corner pixel PHA values of detected events from Level 1 events files. Trended are the mean values for each observation. The overall trend is rather flat, but occasionally individual observations display interesting behavior.
Below is the S2 data, showing both FAINT (+) and VFAINT (diamonds) mode observations.

ACIS Rejected Events Trends

We plot the average number of events telemetered per frame from Level 1 stat files for each observation. Also the number of threshold crossing pixels and the number of rejected events, broken down by events rejected due to bad amplitude, bad grade, and bad position. There is a general downward trend in all quantities, but an as yet unexplained change in slope occurs around DOM 380 and another blip around DOM 630.
- The general trend in all the rates (downward until DOM~380 then recovering) has been monitored by Catherine Grant (S3 amp_rej rates) and Maxim Markevitch(quiescent background in event files). The rates are following the trend in cosmic ray protons (E ~ tens of MeV) which are known to be inversely correlated with the solar cycle (i.e. solar max = low cosmic ray rates). It tracks the ACE SIS rates as well. The time dependence follows the EPHIN Integral Channel flux (see /data/juda2/juda/asc/ephin/EPHIN_int_flux.ps) The same shape appears in the HRC MCP total event rate and Antico Shield rate -Mike Juda & Catherine Grant
An example from CCD0 is shown below, see the link above for other chips.

MTA Problem Tracking

Note: Problem Tracking system is currently not working properly. Many problems reported are not listed on the table.

SIM Movements

Telemetry

LETG Retraction
TSCIUSF1 (SC-IUS FITTING-1 TEMP): yellow warning. Max:349.70 (upper yellow limit: 346.9)

1PDEAAT (PSMC DEA POWER SUPPLY TEMP A): yellow warning. Max:316.39 (upper yellow limit: 316.0)
3RCTUBPT (RCTU BASEPLATE (+X) ABORT HTR TSC2 TEMP): red warning. Max:279.65 (upper red limit: 278.9)
FAMTRTEMP (FA Motor Temperature): yellow warning. Max:283.6 (upper yellow limit: 282.0)
TSCIUSF1 (SC-IUS FITTING-1 TEMP): red warning. Max:354.41 (upper red limit: 349.7)
TSCIUSF8 (SC-IUS FITTING-8 TEMP): red warning. Max:352.84 (upper red limit: 349.7)

BOXTEMP (SEA Box Temperature): yellow warning. Max:293.15 (upper yellow limit: 292.0)

Recent Observations

Trending

Most msids are keeping the same trends from the previous reporting period ( 07/27/01 - 08/02/01 weekly).
Interesting trends are indicated with "*".

• HRMA Thermal

  MSID	DESCRIPTION	COMMENT
  4PRT1AT	IP A: PRE-COLLIMATOR PRT 1 TEMPERATURE	min 211.9, scattered upward to 213.5
  4PRT1BT	IP B: PRE-COLLIMATOR PRT 1 TEMPERATURE	@147.69
  4PRT2AT	IP A: PRE-COLLIMATOR PRT 2 TEMPERATURE	min 210.8, scattered upward to 212.0
  4PRT2BT	IP B: PRE-COLLIMATOR PRT 2 TEMPERATURE	@147.25, some scatter
  4PRT3AT	IP A: PRE-COLLIMATOR PRT 3 TEMPERATURE	@257.80, some upward scatter
  4PRT3BT	IP B: PRE-COLLIMATOR PRT 3 TEMPERATURE	@147.25, some upward scatter
  4PRT4AT	IP A: PRE-COLLIMATOR PRT 4 TEMPERATURE	min 214.4, scattered upward to 215.5
  *4PRT4BT	IP B: PRE-COLLIMATOR PRT 4 TEMPERATURE	slight upward trend after DOM 400, flatter since DOM 550, about 147.65
  4PRT5AT	IP A: PRE-COLLIMATOR PRT 5 TEMPERATURE	min around 208, scattered upward to 209.5
  4PRT5BT	IP B: PRE-COLLIMATOR PRT 5 TEMPERATURE	@147.25
  4RT555T	RT 555 - HRMA TEMP	@249.29
  4RT556T	RT 556 - HRMA TEMP	around 293.99
  4RT557T	RT 557 - HRMA TEMP	@293.95
  4RT558T	RT 558 - HRMA TEMP	@293.95
  4RT559T	RT 559 - HRMA TEMP	@293.95
  4RT560T	RT 560 - HRMA TEMP	@294.63
  4RT561T	RT 561 - HRMA TEMP	between 293.60 and 293.95, more at 293.60 since DOM 650
  4RT562T	RT 562 - HRMA TEMP	@294.96
  4RT563T	RT 563 - HRMA TEMP	@ 295.1 since DOM 550
  4RT564T	RT 564 - HRMA TEMP	@294.63
  4RT565T	RT 565 - HRMA TEMP	@293.95
  4RT567T	RT 567 - HRMA TEMP	around 295.48
  4RT568T	RT 568 - HRMA TEMP	scattered between 285.8 and 286.1
  4RT569T	RT 569 - HRMA TEMP	@294.12
  4RT570T	RT 570 - HRMA TEMP	@294.12
  4RT575T	RT 575 - OB CONE TEMP	@285.45, some scatter below
  4RT576T	RT 576 - OB CONE TEMP	@281.72
  4RT577T	RT 577 - OB CONE TEMP	max @ 284.2, scattered downward to 283.4
  4RT578T	RT 578 - OB CONE TEMP	max @283.9, scattered downward to 283.6
  4RT579T	RT 579 - OB CONE TEMP	scattered between 283.30 and 283.60
  4RT580T	RT 580 - OB CONE TEMP	scattered between 283.0 and 283.6
  4RT581T	RT 581 - OB CONE TEMP	scattered between 283.3 and 285.0
  4RT582T	RT 582 - STRUT TEMP	@ 284.0
  4RT583T	RT 583 - STRUT TEMP	scattered between 286.0 and 286.25, more on high end since DOM 475
  *4RT584T	RT 584 - STRUT TEMP	upward trend stepwise from 287 @DOM 0 to 287.8 now
  *4RT585T	RT 585 - STRUT TEMP	upward trend stepwise from 287 @DOM 0 to 288.0 now
  4RT586T	RT 586 - STRUT TEMP	scattered between 286.6 and 286.8. more at max after DOM 500
  4RT587T	RT 587 - STRUT TEMP	scattered between 285.0 and 285.2
  4RT588T	RT 588 - STRUT TEMP	scattered around 283.35, very slight downward trend
  4RT589T	RT 589 - STRUT TEMP	scattered around 283.12, very slight downward trend
  4RT590T	RT 590 - STRUT TEMP	scattered between 283.0 and 285.5
  4RT591T	RT 591 - STRUT TEMP	scattered between 283 and 286
  4RT592T	RT 592 - STRUT TEMP	scattered around 293.05
  4RT593T	RT 593 - STRUT TEMP	around 283.27
  4RT594T	RT 594 - TFTE TEMP	@ 287.43, some scatter
  4RT595T	RT 595 - TFTE TEMP	scattered between 282.6 and 292.9, more at the top after DOM 500
  4RT596T	RT 596 - TFTE TEMP	min 280.62, scattered upward
  *4RT597T	RT 597 - TFTE TEMP	upward trend from 282.5 @DOM 0 to 285.0 now
  *4RT598T	RT 598 - TFTE TEMP	upward trend from 283 @DOM 100 to 285.0 now
  *4RT700T	RT 700 - OB BULKHEAD TEMP	scattered around 285.8, slight upward trend
  *4RT701T	RT 701 - OB BULKHEAD TEMP	scattered around 285.5, slight upward trend, range 284.2 to 284.8
  4RT702T	RT 702 - OB BULKHEAD TEMP	scattered between 284.2 and 284.6, more at the top
  4RT703T	RT 703 - OB BULKHEAD TEMP	scattered between 293.9 and 284.2, more at the top
  4RT704T	RT 704 - OB BULKHEAD TEMP	@ 284.23, scattered upward
  4RT705T	RT 705 - OB BULKHEAD TEMP	@280.44
  4RT706T	RT 706 - OB BULKHEAD TEMP	@279.14
  4RT707T	RT 707 - OB BULKHEAD TEMP	@282.67
  4RT708T	RT 708 - OB BULKHEAD TEMP	scattered between 282.65 and 283.00
  4RT709T	RT 709 - OB BULKHEAD TEMP	scattered between 283.9 and 284.25
  4RT710T	RT 710 - OB BULKHEAD TEMP	around 284.5 slight upward trend
  4RT711T	RT 711 - OB BULKHEAD TEMP	scattered between 284.55 and 284.8 more at top after DOM 450