TOF Changes Run Log.
Date of last update: 11/14/03 at 16:20
| Problem/Change | Runs Effected | Initial Date: | Final Date: |
| Camac TC failed. There is no timing information for these runs. | 3111-3556 | 5/25/2000 | 6/16/2000 |
| 5ns cables for TC from patch panel to discriminators were removed to replace failed camac. ADC channels should have x2 the gain. | 3309-3556 | 6/9/2000 | 6/16/2000 |
| Sensor TC 76 D was broken right at the point of the TC crate replacement. There is no timing information from these runs on that sensor. | 3556-4490 | 6/16/2000 | 7/31/2000 |
| The sum output from the cosmic trigger discriminator was not connected after the TC crate was replaced. | 3556-4523 | 6/16/2000 | 8/2/2000 |
| Changed ADC gate because real signals were arriving at the end of the gate. A 60ns delay was introduced. This didn't completely correct the problem. The signals in a real gate come within a range of 25ns. Some of the real signals were being cut off by the leading edge of the ADC gate. Furthermore, this delay results in the cosmic signal being 55ns too early with respect to the leading edge of the gate. | 3797-4372 | 6/23/2000 | 7/25/2000 |
| Slot #8 in TC camac no longer can be set to remote mode. It is currently in local mode, but this has no effect on the data. | >3797 | 6/23/2000 | present |
| The FB fast clear was arriving too early with respect to the TOF ADC gate after the delay. The fast clear was delayed, and the FB read is not affect by this problem from this point. | >4000 | 7/1/2000 | present |
| Discriminator in slot #17 for TC camac was set to -9mV. This resulted in a high count rate for 6 channels. TC12U, TC64U, TC66U, TC112U, TC119U, TC26D. | ~4280-4411 | ~7/11/2000 | ~7/27/200 |
| TC camac's power was toggle. This had no effect on slot #8. | >4280 | 7/11/2000 | present |
| LED trigger signal was delay in order to get the LED signal into the ADC gate. This was done since the ADC gate was delayed by 60ns. | >4364 | 7/24/2000 | present |
| ADC gate was un-delay by 10ns because some of the real signals were being cut off by the leading edge of the gate. Furthermore, this delay results in the cosmic signal being 45ns too early with respect to the leading edge of the gate. | 4372-4592 | 7/25/2000 | 8/4/2000 |
| TDC gate was delayed by 90ns to make sure the timing signals for the TOF are in the high resolution range of the TDC's. | 4411-4463 | 7/26/2000 | 7/30/2000 |
| TDC gate was removed because of conflicts with trigger data in the TDC in FB slot #9. | 4464-4539 | 7/30/2000 | 8/2/2000 |
| TDC gate was delayed by 90ns, and this is permanent. | >4540 | 8/2/2000 | present |
| ADC gate was adjusted to insure full integration of all TOF signals. The gate was moved 10ns foward in time and was widen by 10ns. | >4593 | 8/4/2000 | present |
| PMT #8E21L1 {Base #82, Sensors TB28-2B(TB40-43) down} current had a dramatic increase in current by 23microAmps. These channels are given bad signal for both energy and time. | 5497-6024 | 8/28/2000 | 4/23/2001 |
| Wall TB camac crate failed. The load on the UPS to that crate is zero. There is no TDC information from wall TB in these runs. | 5554-5564 | 9/1/2000 | 9/1/2000 |
| PMT #8E21L1 {Base #82, Sensors TB28-2B(TB40-43) down} turned OFF. | 5621-6024 | 9/4/2000 | 4/23/2001 |
| TOF wall Turned OFF because HI physic run is finished. | 9/5/2000 | 4/23/2001 | |
| Wall TC crate replace with BiRa crate | 5701 | 11/1/2000 | present |
| Or set in electronics. If TOF calibration trigger is applied. ADC gate is un-delayed by 40ns. | 5701 | 10/31/2000 | present |
| TOF cosmic trigger now comes at 20-25ns before signal. | 5710 | 11/3/2000 | present |
| 5ns cable from TOF patch panel to discriminators moved.
041/A1 now goes to TC slot #17 ref. cable channel 1 101/A1 now goes to TC slot #17 ref. cable channel 2, this channel now has an additional 6ns delay in its timing. The additional delay comes from the additional cable needed to route to the discriminator in the TC camac crate. |
5710 | 11/3/2000 | present |
| TOF wall turned ON for HI run 2001. Al channels are accounted for. | >=6024 | 4/23/2001 | 1/25/2002 |
| ADC gate has been increased from 80ns to 95 ns.
Gate shifted back to 80ns to preserve continunity between LED runs. |
>=6238
except 6217 |
5/31/2001 | 7/09/01 |
| ADC gate was not terminated properly. Corrected problem. ADC gate at 95ns in width. | >=7005 | 7/09/01 | present |
| TOF Discriminator thresholds have been adjusted to -250mV | 7062-7257 | 7/11/01 | 7/19/01 |
| TOF Discriminator thresholds have been adjusted to -375mV | >= 7257 | 7/19/01 | present |
| Missing ADC channel in wall TB. Sensor #86 Down. | 7255-7284 | 7/19/2001 8AM | 7/20/2001 5PM |
| Wall TB UPS failure. No wall TB data.
Camac Crate not powered through a UPS from 9/22 - 11/08 |
8167-8170 | 9/21/01 ~11pm | 11/08/01 ~11am |
| New UPS installed for CAMAC crate #4 | 11/08/01 | Present | |
| Wall TB Camac crate failure. No useable data from wall TB | 9123-9145 | 11/21/01~10:30pm | 11/22/01~10pm |
| Wall TB Camac Crate failure. No useable data from wall TB. | 9278-9287 | 12/25/2001 | 12/28/2001 |
| Wall TB Camac crate failure. No useable data from wall TB | 9617-9649 | 01/18/02 ~19:45 | 01/21/2002~15:30pm |
| ADC gate input to the fastbus terminated with 50 ohm terminator | 9655-present | bet. 11/26 & 12/31 | 01/21/2002 ~6pm |
| HV for TOF and T0s have been turned off. | PR01 EOR | 1/25/2002 | 12/01/2002 |
| HV, CAMAC & alarm sender VIs have been shut down. | PR01 EOR | 1/25/2002 | 12/01/2002 |
| CAMAC crates 3 & 4 have been turned off. | PR01 EOR | 1/25/2002 | 12/01/2002 |
| TOF wall protections have been installed | PR01 EOR | 1/25/2002 | present |
| HV for TOF has been turned ON | PR03 BOR | 12/01/2002 | present |
| TOF and T0 Widths changed to 50-55ns | 10580- | 01/15/03 | present |
| TOF LC 3412 discriminator in slots 20 replaced by LC 4413 model | PR04 | 11/12/03 | present |
| T0 LC 4413 discriminator replaced by LC 3412 model | PR04 | 11/12/03 | present |
| T0 ribbon cables replaced by Twinax cables | PR04 | 11/13/03 | present |